HBASE-10274 MiniZookeeperCluster should close ZKDatabase when shutdown ZooKeeperServers (chendihao via enis)

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1557923 13f79535-47bb-0310-9956-ffa450edef68
HBASE-10320 Avoid ArrayList.iterator() ExplicitColumnTracker

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1557951 13f79535-47bb-0310-9956-ffa450edef68
HBASE-10335 AuthFailedException in zookeeper may block replication forever (Liu Shaohui)

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1558304 13f79535-47bb-0310-9956-ffa450edef68
Merge branch '0.94' of https://github.com/apache/hbase into 0.94