HIVE-8943: Fix memory limit check for combine nested mapjoins [Spark Branch] (Szehon via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1643058 13f79535-47bb-0310-9956-ffa450edef68
HIVE-8991: Fix custom_input_output_format [Spark Branch] (Rui via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1643157 13f79535-47bb-0310-9956-ffa450edef68
HIVE-9011: Fix parquet_join.q determinism (Jimmy via Xuefu)
Merged from trunk, r1643125

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1643159 13f79535-47bb-0310-9956-ffa450edef68
HIVE-9027 : Enable ppd_join4 [Spark Branch] (Chao Sun via Szehon)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1643162 13f79535-47bb-0310-9956-ffa450edef68
HIVE-8783: Create some tests that use Spark counter for stats collection [Spark Branch] (Chengxiang via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1643294 13f79535-47bb-0310-9956-ffa450edef68
HIVE-9016: SparkCounter display name is not set correctly[Spark Branch] (Chengxiang via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1643295 13f79535-47bb-0310-9956-ffa450edef68
HIVE-8992: Fix bucket related test failure: parquet_join.q [Spark Branch] (Jimmy via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1643380 13f79535-47bb-0310-9956-ffa450edef68
HIVE-8536: Enable SkewJoinResolver for spark [Spark Branch] (Rui via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1643744 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'upstream/spark' into spark