HIVE-8989: Make groupby_multi_single_reducer.q and smb_mapjoin_3.q deterministic (Brock via Xuefu, reviewed by Szehon)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1642289 13f79535-47bb-0310-9956-ffa450edef68