HIVE-3392 : Hive unnecessarily validates table SerDes when dropping a table (Navis reviewed by Jason Dere)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1609613 13f79535-47bb-0310-9956-ffa450edef68
HIVE-6252 : sql std auth - support 'with admin option' in revoke role metastore api (Jason Dere via Thejas Nair)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1609876 13f79535-47bb-0310-9956-ffa450edef68