Remove gp_resgroup_memory_policy from postgres.conf
Remove gp_resgroup_memory_policy from postgres.conf

gp_resgroup_memory_policy is recently introduced by resource group
module, so when running binary swap cases, the old binary can not
recognize it, so remove it to make cases pass

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