OZG-6923 add commitId to feature branch image tag/helm version

Jenkinsfile

@@ -420,16 +420,6 @@ String getPomVersion(String pomFile){
     return pom.version
 }
 
-String buildVersionName() {
-    def imageTag = "${env.BRANCH_NAME}-${getPomVersion('pom.xml')}"
-
-    if (env.BRANCH_NAME == 'master') {
-        imageTag += "-${env.GIT_COMMIT.take(7)}"
-    }
-
-    return imageTag
-}
-
 Void tagAndPushDockerImage(String newTag) {
     withCredentials([usernamePassword(credentialsId: 'jenkins-nexus-login', usernameVariable: 'USER', passwordVariable: 'PASSWORD')]) {
         sh 'docker login docker.ozg-sh.de -u ${USER} -p ${PASSWORD}'