HIVE-9202: Choose Kryo as the serializer for pTest [Spark Branch]

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1647694 13f79535-47bb-0310-9956-ffa450edef68
HIVE-9207: Add more log information for debug RSC[Spark Branch] (Chengxiang via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1647730 13f79535-47bb-0310-9956-ffa450edef68
HIVE-9209: Spark branch compile failed on hadoop-1[Spark Branch] (Chengxiang via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1647732 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'upstream/spark' into spark