HBASE-7669 ROOT region wouldn't be handled by PRI-IPC-Handler(Chunhui)

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1438834 13f79535-47bb-0310-9956-ffa450edef68
HBASE-7669 Addendum fixes TestPriorityRpc



git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1438853 13f79535-47bb-0310-9956-ffa450edef68