HIVE-6437 : DefaultHiveAuthorizationProvider should not initialize a new HiveConf (Navis via Thejas Nair)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1614929 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7488 : pass column names being used for inputs to authorization api (Thejas Nair reviewed by Jason Dere, Navis)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1614931 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7547 : Add ipAddress and userName to ExecHook (Szehon, reviewed by Thejas)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1615022 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7562 : Cleanup ExecReducer (Brock Noland reviewed by Szehon Ho, Navis)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1615036 13f79535-47bb-0310-9956-ffa450edef68