OZG-6177 adjust helm repository on release branch

Jenkinsfile

@@ -205,7 +205,7 @@ pipeline {
 Void deployHelmChart(String helmChartVersion) {
     withCredentials([usernamePassword(credentialsId: 'jenkins-nexus-login', usernameVariable: 'USERNAME', passwordVariable: 'PASSWORD')]){
        
-        result = sh script: '''curl -u $USERNAME:$PASSWORD https://nexus.ozg-sh.de/service/rest/v1/components?repository=ozg-base-apps-snapshot -F file=@ozgcloud-elster-transfer-operator-'''+helmChartVersion+'''.tgz''', returnStdout: true
+        result = sh script: '''curl -u $USERNAME:$PASSWORD https://nexus.ozg-sh.de/service/rest/v1/components?repository=''' + getHelmRepository() +''' -F file=@ozgcloud-elster-transfer-operator-'''+helmChartVersion+'''.tgz''', returnStdout: true
 
         if (result != '') {
             error(result)
@@ -213,11 +213,11 @@ Void deployHelmChart(String helmChartVersion) {
     }
 }
 
-String getHelmRepoUrl(){
+String getHelmRepository(){
     if (isReleaseBranch()) {
-        return "https://nexus.ozg-sh.de/service/rest/v1/components?repository=ozg-base-apps"
+        return 'ozg-base-apps'
     }
-    return "https://nexus.ozg-sh.de/service/rest/v1/components?repository=ozg-base-apps-snapshot"
+    return 'ozg-base-apps-snapshot'
 }
 
 String validateBranchName(branchName) {