OZG-5907 update branch jar name schema in jenkinsfile

Jenkinsfile

@@ -44,10 +44,18 @@ pipeline {
         }
 
         stage('Set Version') {
+          when {
+            not {
+                anyOf {
+                    branch 'master'
+                    branch 'release'
+                }
+            }
+          }
           steps {
                 script {
                     FAILED_STAGE=env.STAGE_NAME
-                    JAR_TAG = generateImageTag('pom.xml')
+                    JAR_TAG = generateBranchPRJarTag('pom.xml')
                 }
                 configFileProvider([configFile(fileId: 'maven-settings', variable: 'MAVEN_SETTINGS')]) {
                     sh "mvn -s $MAVEN_SETTINGS versions:set -DnewVersion=${JAR_TAG} -DprocessAllModules=true"
@@ -281,6 +289,13 @@ String generateImageTag(String pomFile) {
     return imageTag
 }
 
+String generateBranchPRJarTag(String pomFile) {
+    def (version, snapshot) = getPomVersion(pomFile).split('-')
+    def jarTag = "${version}-${env.BRANCH_NAME}-${snapshot}"
+
+    return jarTag
+}
+
 Void configureGit() {
     final email = "jenkins@ozg-sh.de"
     final name = "jenkins"