HIVE-7331: Spark compiler ground work

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1612125 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7431: When run on spark cluster, some spark tasks may fail

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1612189 13f79535-47bb-0310-9956-ffa450edef68