OZG-6177 add junittests

Jenkinsfile

...cloud/operator/elstertransfer/user/ConfigMapUserList.java

...ertransfer/user/OzgCloudElsterTransferUserReconciler.java

...lstertransfer/user/OzgCloudElsterTransferUserService.java

...fer/user/OzgCloudElsterTransferUserRemoteServiceTest.java

...rtransfer/user/OzgCloudElsterTransferUserServiceTest.java