HBASE-10621 Unable to grant user permission to namespace



git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1572421 13f79535-47bb-0310-9956-ffa450edef68
HBASE-10594 Revert due to test instability

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1572439 13f79535-47bb-0310-9956-ffa450edef68