HBASE-9098: During recovery use ZK as the source of truth for region state - v2

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1512553 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9152 Not able to find HMaster and HRegionServer processes with grep by process name on ps result because of large classpath as argument.

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1512560 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-YAHOO-317-trunk-gd