HIVE-7799 - TRANSFORM failed in transform_ppr1.q [Spark Branch] (Chengxiang Li via Brock)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1620427 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7810 - Insert overwrite table query has strange behavior when set hive.optimize.union.remove=true [Spark Branch] (Na Yang via Brock)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1620492 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch 'upstream/spark' into spark