HBASE-9525 "Move" region right after a region split is dangerous

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.96@1523836 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9552. NPE while updating RegionServers with the favored nodes assignments.

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.96@1523850 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9496 make sure HBase APIs are compatible between 0.94 and 0.96

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.96@1523854 13f79535-47bb-0310-9956-ffa450edef68