Percentile functions can now reference outer queries, fix expected output.
Percentile functions can now reference outer queries, fix expected output.

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