Merge pull request #559 from imonteroperez/patch-1

Bump plugin parent pom to 4.78

pom.xml

@@ -4,7 +4,7 @@
   <parent>
     <groupId>org.jenkins-ci.plugins</groupId>
     <artifactId>plugin</artifactId>
-    <version>4.77</version>
+    <version>4.78</version>
     <relativePath/>
   </parent>
 
@@ -17,8 +17,6 @@
     <changelist>999999-SNAPSHOT</changelist>
     <jenkins.version>2.387.3</jenkins.version>
     <gitHubRepo>jenkinsci/${project.artifactId}-plugin</gitHubRepo>
-    <!-- TODO until in parent -->
-    <jenkins-test-harness.version>2146.v6b_f8b_1cb_d12d</jenkins-test-harness.version>
   </properties>
   <licenses>
     <license>