HIVE-8026: CBO: check for Grouping Sets, Cube and Rollup and bail to non cbo planning (Harish Butani via Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/cbo@1623615 13f79535-47bb-0310-9956-ffa450edef68