HIVE-8542: Enable groupby_map_ppr.q and groupby_map_ppr_multi_distinct.q [Spark Branch] (Rui via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1638033 13f79535-47bb-0310-9956-ffa450edef68