AMBARI-3770. Need better error log message when agent unable to reach server (Dmytro Shkvyra via dlysnichenko)
AMBARI-3777. Remove HDPLocal stack from stack definition. (yusaku)
Revert "AMBARI-3775. Adding or Deleting zookeeper servers should reconfigure ha.zookeeper.quorum, hbase.zookeeper.quorum, and templeton.zookeeper.hosts properties. (onechiporenko)"

This reverts commit 16d4306a6a42c2f82fe4c0f3705d55e6e2d18e37.