Fixing tests for DQA with ROLLUP()
Fixing tests for DQA with ROLLUP()

Post window function Postgres merge, queries with distinct qualified
aggs and ROLLUP were generating wrong results. This issue fixed by
disabling the guc gp_enable_groupext_distinct_pruning

Signed-off-by: Haisheng Yuan <d24d5fc9e8498fe12c79f514db1a69a6d06b8a3c@pivotal.io>

50wu/gpdb,lisakowen/gpdb,jmcatamney/gpdb,lisakowen/gpdb,greenplum-db/gpdb,50wu/gpdb,ashwinstar/gpdb,edespino/gpdb,adam8157/gpdb,edespino/gpdb,greenplum-db/gpdb,ashwinstar/gpdb,lisakowen/gpdb,Chibin/gpdb,yuanzhao/gpdb,ashwinstar/gpdb,Chibin/gpdb,adam8157/gpdb,jmcatamney/gpdb,50wu/gpdb,greenplum-db/gpdb,ashwinstar/gpdb,50wu/gpdb,Chibin/gpdb,edespino/gpdb,jmcatamney/gpdb,xinzweb/gpdb,yuanzhao/gpdb,edespino/gpdb,Chibin/gpdb,adam8157/gpdb,yuanzhao/gpdb,jmcatamney/gpdb,edespino/gpdb,adam8157/gpdb,edespino/gpdb,xinzweb/gpdb,yuanzhao/gpdb,Chibin/gpdb,ashwinstar/gpdb,ashwinstar/gpdb,lisakowen/gpdb,Chibin/gpdb,greenplum-db/gpdb,Chibin/gpdb,jmcatamney/gpdb,50wu/gpdb,ashwinstar/gpdb,jmcatamney/gpdb,adam8157/gpdb,lisakowen/gpdb,edespino/gpdb,jmcatamney/gpdb,xinzweb/gpdb,Chibin/gpdb,greenplum-db/gpdb,adam8157/gpdb,50wu/gpdb,greenplum-db/gpdb,edespino/gpdb,50wu/gpdb,xinzweb/gpdb,edespino/gpdb,yuanzhao/gpdb,yuanzhao/gpdb,lisakowen/gpdb,ashwinstar/gpdb,xinzweb/gpdb,edespino/gpdb,lisakowen/gpdb,adam8157/gpdb,Chibin/gpdb,yuanzhao/gpdb,50wu/gpdb,yuanzhao/gpdb,greenplum-db/gpdb,xinzweb/gpdb,yuanzhao/gpdb,xinzweb/gpdb,greenplum-db/gpdb,adam8157/gpdb,jmcatamney/gpdb,lisakowen/gpdb,Chibin/gpdb,yuanzhao/gpdb,xinzweb/gpdb