HIVE-5493 : duplicate jars with different versions for guava, commons-logging (Thejas Nair via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.12@1530756 13f79535-47bb-0310-9956-ffa450edef68
HIVE-5476: Authorization-provider tests fail in sequential run (Sushanth Sowmyan via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.12@1530770 13f79535-47bb-0310-9956-ffa450edef68
HIVE-5497 : Hive trunk broken against hadoop 0.20.2 (Thejas M Nair via Brock Noland)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.12@1530839 13f79535-47bb-0310-9956-ffa450edef68
Updating RELEASE_NOTES.txt for commits since 0.12.0 RC0

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.12@1530840 13f79535-47bb-0310-9956-ffa450edef68