Fix __gp_user_tables_readable to not error out on inaccessible schemas.
Fix __gp_user_tables_readable to not error out on inaccessible schemas.

If there is a schema in the database that the user does not have access to,
doing "select * from gp_toolkit.__gp_user_tables_readable" throws a
permission denied error on the schema. Use the relation-OID-variant of
has_table_privilege() function, to work around that.

Quikling/gpdb,lpetrov-pivotal/gpdb,chrishajas/gpdb,Quikling/gpdb,ashwinstar/gpdb,chrishajas/gpdb,50wu/gpdb,ahachete/gpdb,yuanzhao/gpdb,0x0FFF/gpdb,yuanzhao/gpdb,lisakowen/gpdb,rubikloud/gpdb,Chibin/gpdb,jmcatamney/gpdb,royc1/gpdb,50wu/gpdb,kaknikhil/gpdb,0x0FFF/gpdb,CraigHarris/gpdb,jmcatamney/gpdb,tangp3/gpdb,yuanzhao/gpdb,Quikling/gpdb,adam8157/gpdb,lisakowen/gpdb,50wu/gpdb,zaksoup/gpdb,lpetrov-pivotal/gpdb,foyzur/gpdb,janebeckman/gpdb,ashwinstar/gpdb,kaknikhil/gpdb,zaksoup/gpdb,lpetrov-pivotal/gpdb,ahachete/gpdb,rubikloud/gpdb,adam8157/gpdb,kaknikhil/gpdb,CraigHarris/gpdb,foyzur/gpdb,tangp3/gpdb,atris/gpdb,jmcatamney/gpdb,lisakowen/gpdb,xuegang/gpdb,chrishajas/gpdb,xinzweb/gpdb,cjcjameson/gpdb,rvs/gpdb,kaknikhil/gpdb,lpetrov-pivotal/gpdb,lisakowen/gpdb,tangp3/gpdb,zaksoup/gpdb,lpetrov-pivotal/gpdb,jmcatamney/gpdb,ashwinstar/gpdb,ahachete/gpdb,tangp3/gpdb,ahachete/gpdb,Quikling/gpdb,foyzur/gpdb,zaksoup/gpdb,greenplum-db/gpdb,rubikloud/gpdb,ahachete/gpdb,edespino/gpdb,kaknikhil/gpdb,CraigHarris/gpdb,lisakowen/gpdb,royc1/gpdb,yuanzhao/gpdb,CraigHarris/gpdb,lintzc/gpdb,yuanzhao/gpdb,Quikling/gpdb,adam8157/gpdb,rvs/gpdb,cjcjameson/gpdb,greenplum-db/gpdb,lintzc/gpdb,Quikling/gpdb,50wu/gpdb,lpetrov-pivotal/gpdb,CraigHarris/gpdb,yuanzhao/gpdb,Chibin/gpdb,chrishajas/gpdb,lisakowen/gpdb,Chibin/gpdb,Chibin/gpdb,lintzc/gpdb,xuegang/gpdb,lintzc/gpdb,kaknikhil/gpdb,randomtask1155/gpdb,rvs/gpdb,cjcjameson/gpdb,rvs/gpdb,kaknikhil/gpdb,50wu/gpdb,atris/gpdb,rvs/gpdb,rubikloud/gpdb,greenplum-db/gpdb,xinzweb/gpdb,Chibin/gpdb,xuegang/gpdb,jmcatamney/gpdb,kaknikhil/gpdb,lpetrov-pivotal/gpdb,xinzweb/gpdb,Chibin/gpdb,randomtask1155/gpdb,edespino/gpdb,Chibin/gpdb,edespino/gpdb,xuegang/gpdb,xuegang/gpdb,ashwinstar/gpdb,greenplum-db/gpdb,Chibin/gpdb,janebeckman/gpdb,lintzc/gpdb,rubikloud/gpdb,janebeckman/gpdb,edespino/gpdb,royc1/gpdb,greenplum-db/gpdb,lisakowen/gpdb,greenplum-db/gpdb,jmcatamney/gpdb,randomtask1155/gpdb,cjcjameson/gpdb,chrishajas/gpdb,ashwinstar/gpdb,yuanzhao/gpdb,royc1/gpdb,xinzweb/gpdb,royc1/gpdb,edespino/gpdb,edespino/gpdb,rubikloud/gpdb,randomtask1155/gpdb,adam8157/gpdb,kaknikhil/gpdb,xuegang/gpdb,atris/gpdb,rubikloud/gpdb,xuegang/gpdb,ashwinstar/gpdb,50wu/gpdb,adam8157/gpdb,CraigHarris/gpdb,atris/gpdb,0x0FFF/gpdb,tangp3/gpdb,royc1/gpdb,ahachete/gpdb,xinzweb/gpdb,chrishajas/gpdb,0x0FFF/gpdb,randomtask1155/gpdb,foyzur/gpdb,0x0FFF/gpdb,lpetrov-pivotal/gpdb,Quikling/gpdb,foyzur/gpdb,lintzc/gpdb,edespino/gpdb,zaksoup/gpdb,jmcatamney/gpdb,randomtask1155/gpdb,rvs/gpdb,ahachete/gpdb,janebeckman/gpdb,randomtask1155/gpdb,ashwinstar/gpdb,ahachete/gpdb,edespino/gpdb,atris/gpdb,xinzweb/gpdb,rvs/gpdb,cjcjameson/gpdb,CraigHarris/gpdb,jmcatamney/gpdb,0x0FFF/gpdb,lintzc/gpdb,rvs/gpdb,50wu/gpdb,yuanzhao/gpdb,rvs/gpdb,Chibin/gpdb,CraigHarris/gpdb,cjcjameson/gpdb,chrishajas/gpdb,janebeckman/gpdb,xinzweb/gpdb,kaknikhil/gpdb,Quikling/gpdb,0x0FFF/gpdb,janebeckman/gpdb,atris/gpdb,atris/gpdb,ashwinstar/gpdb,Quikling/gpdb,rubikloud/gpdb,adam8157/gpdb,xuegang/gpdb,zaksoup/gpdb,cjcjameson/gpdb,50wu/gpdb,0x0FFF/gpdb,royc1/gpdb,tangp3/gpdb,yuanzhao/gpdb,Quikling/gpdb,lisakowen/gpdb,atris/gpdb,tangp3/gpdb,janebeckman/gpdb,yuanzhao/gpdb,xuegang/gpdb,zaksoup/gpdb,Chibin/gpdb,lintzc/gpdb,foyzur/gpdb,tangp3/gpdb,zaksoup/gpdb,foyzur/gpdb,CraigHarris/gpdb,cjcjameson/gpdb,lintzc/gpdb,chrishajas/gpdb,royc1/gpdb,edespino/gpdb,janebeckman/gpdb,greenplum-db/gpdb,cjcjameson/gpdb,xinzweb/gpdb,cjcjameson/gpdb,adam8157/gpdb,foyzur/gpdb,rvs/gpdb,adam8157/gpdb,edespino/gpdb,randomtask1155/gpdb,janebeckman/gpdb,greenplum-db/gpdb,janebeckman/gpdb