HIVE-8725: spark-client build failed sometimes.[Spark Branch] (Chengxiang via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1636591 13f79535-47bb-0310-9956-ffa450edef68
HIVE-8670: Combine Hive Operator statistic and Spark Metric to an uniformed query statistic.[Spark Branch] (Chengxiang via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1636599 13f79535-47bb-0310-9956-ffa450edef68
HIVE-8623: Implement HashTableLoader for Spark map-join [Spark Branch] (Jimmy via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1636789 13f79535-47bb-0310-9956-ffa450edef68