HBASE-10739 RS web UI NPE if master shuts down sooner

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1577415 13f79535-47bb-0310-9956-ffa450edef68
HBASE-10744 AM#CloseRegion no need to retry on FailedServerException

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1577416 13f79535-47bb-0310-9956-ffa450edef68