HBASE-10018 Change the location prefetch

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1585518 13f79535-47bb-0310-9956-ffa450edef68
HBASE-10911 ServerShutdownHandler#toString shows meaningless message

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1585576 13f79535-47bb-0310-9956-ffa450edef68