Fix NullPointerException in ConfigMapEnricher

[rohanKanojia]

This also seems to be a sideeffect of sundrio configuration change, A user
emailed about this problem.

To reproduce you can simply run fabric8:resource on one of these samples:

https://github.com/r0haaaan/eclipse-jkube-sample-with-resource-fragments

I checked again and I think this was the last place where annotations were being accessed unsafely. At other places it seems we're just appending newly created annotation depending upon enricher

~/work/repos/fabric8-maven-plugin : $ git grep -in "getAnnotations()" | grep "Enricher.java"
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/CdEnricher.java:95:    public Map<String, String> getAnnotations() {
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/CdEnricher.java:127:                serviceBuilder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/CdEnricher.java:134:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/CdEnricher.java:141:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/CdEnricher.java:148:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/CdEnricher.java:155:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/CdEnricher.java:162:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/CdEnricher.java:169:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/CdEnricher.java:176:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/DocLinkEnricher.java:57:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/DocLinkEnricher.java:64:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/DocLinkEnricher.java:71:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/DocLinkEnricher.java:78:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/DocLinkEnricher.java:85:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/DocLinkEnricher.java:92:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/DocLinkEnricher.java:99:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/DocLinkEnricher.java:104:    public Map<String, String> getAnnotations() {
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/GrafanaLinkEnricher.java:55:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/GrafanaLinkEnricher.java:62:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/GrafanaLinkEnricher.java:69:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/GrafanaLinkEnricher.java:76:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/GrafanaLinkEnricher.java:83:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/GrafanaLinkEnricher.java:90:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/GrafanaLinkEnricher.java:97:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/deprecated/src/main/java/io/fabric8/maven/enricher/deprecated/GrafanaLinkEnricher.java:102:    public Map<String, String> getAnnotations() {
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/ConfigMapEnricher.java:60:                final Map<String, String> annotations = element.buildMetadata().getAnnotations();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/FileDataSecretEnricher.java:51:                final Map<String, String> annotations = element.buildMetadata().getAnnotations();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/GitEnricher.java:58:    private Map<String, String> getAnnotations() {
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/GitEnricher.java:107:                serviceBuilder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/GitEnricher.java:114:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/GitEnricher.java:121:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/GitEnricher.java:128:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/GitEnricher.java:135:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/GitEnricher.java:142:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/GitEnricher.java:149:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/GitEnricher.java:156:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/MavenIssueManagementEnricher.java:61:                serviceBuilder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/MavenIssueManagementEnricher.java:68:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/MavenIssueManagementEnricher.java:75:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/MavenIssueManagementEnricher.java:82:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/MavenIssueManagementEnricher.java:89:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/MavenIssueManagementEnricher.java:96:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/MavenIssueManagementEnricher.java:103:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/MavenIssueManagementEnricher.java:110:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/MavenIssueManagementEnricher.java:115:    private Map<String, String> getAnnotations() {
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/MavenScmEnricher.java:58:    private Map<String, String> getAnnotations() {
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/MavenScmEnricher.java:85:                serviceBuilder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/MavenScmEnricher.java:92:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/MavenScmEnricher.java:99:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/MavenScmEnricher.java:106:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/MavenScmEnricher.java:113:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/MavenScmEnricher.java:120:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/MavenScmEnricher.java:127:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/MavenScmEnricher.java:134:                builder.editMetadata().addToAnnotations(getAnnotations()).endMetadata();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/PodAnnotationEnricher.java:60:                        templateMetadata.setAnnotations(MapUtil.mergeMaps(templateMetadata.getAnnotations(), metadata.getAnnotations()));
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/PodAnnotationEnricher.java:75:                        templateMetadata.setAnnotations(MapUtil.mergeMaps(templateMetadata.getAnnotations(), metadata.getAnnotations()));
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/RemoveBuildAnnotationsEnricher.java:52:                Map<String, String> annotations = metadata.getAnnotations();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/SecretEnricher.java:58:                Map<String, String> annotation = secretBuilder.buildMetadata().getAnnotations();
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/TriggersAnnotationEnricher.java:121:                res.getMetadata().getAnnotations() == null ||
enricher/standard/src/main/java/io/fabric8/maven/enricher/standard/TriggersAnnotationEnricher.java:122:                !res.getMetadata().getAnnotations().containsKey(TRIGGERS_ANNOTATION);