AMBARI-3775. Adding or Deleting zookeeper servers should reconfigure ha.zookeeper.quorum, hbase.zookeeper.quorum, and templeton.zookeeper.hosts properties. (onechiporenko)
AMBARI-3805. "Add service" if nothing to add. (onechiporenko)
AMBARI-3806 Cannot save Default configs when overridden config present. (atkach)