HBASE-8779 Add mutateRow method support to Thrift2 (Hamed Madani)

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1504255 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8945 Backport to 0.94: HBASE-7952 Remove update() and Improve ExplicitColumnTracker performance. (orginal path by Raymond Liu)

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1504313 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8968  Avoid call to zk in HRegionServer#getMaster() to log the master address which already read from the zk. (rajeshbabu)

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1504335 13f79535-47bb-0310-9956-ffa450edef68