refactor: remove code smells in KitLogger.java (eclipse-jkube#812)

* declared line 136 as final and added @SuppressWarnings regarding the use of System.out in KitLogger.java

* reordered 'final' and 'private'

* .DS_Store banished!

jkube-kit/common/src/main/java/org/eclipse/jkube/kit/common/KitLogger.java

@@ -102,6 +102,7 @@ default void progressUpdate(String layerId, String status, String progressMessag
      */
     default void progressFinished() {}
 
+    @SuppressWarnings("java:S106")
     class StdoutLogger implements KitLogger {
         @Override
         public void debug(String format, Object... params) {
@@ -133,7 +134,7 @@ public boolean isDebugEnabled() {
     enum LogVerboseCategory {
         BUILD("build"), API("api");
 
-        private String category;
+        private final String category;
 
         LogVerboseCategory(String category) {
             this.category = category;