Fix expected output, WITHIN GROUP aggregates with GROUPING SETS is allowed.
Fix expected output, WITHIN GROUP aggregates with GROUPING SETS is allowed.

I didn't do anything special to make it work, but these queries seem to
produce the correct result, so I presume it works..

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