HIVE-8457: MapOperator initialization fails when multiple Spark threads is enabled [Spark Branch] (Chao via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1634116 13f79535-47bb-0310-9956-ffa450edef68
HIVE-8533: Enable all q-tests for multi-insertion [Spark Branch] (Chao via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1634122 13f79535-47bb-0310-9956-ffa450edef68