HBASE-9456. Meta doesn't get assigned in a master failure scenario.

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1521569 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9481. Servershutdown handler get aborted with ConcurrentModificationException

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1521571 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9487 create_namespace with property value throws error

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1521577 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9483 [WINDOWS] Allow running upgrade tool from hbase.cmd

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1521579 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd