Fix not-quite-right Assertion.  Did not work at all in extended-query mode (per complaint from Kris Jurka) and it was only by chance that it didn't fail in simple-query mode.  A COMMIT or ROLLBACK has to be executed by a portal, therefore it's wrong to suppose that there aren't any live portals at CleanupTransaction time.
Fix not-quite-right Assertion.  Did not work at all in extended-query
mode (per complaint from Kris Jurka) and it was only by chance that it
didn't fail in simple-query mode.  A COMMIT or ROLLBACK has to be
executed by a portal, therefore it's wrong to suppose that there aren't
any live portals at CleanupTransaction time.

royc1/gpdb,CraigHarris/gpdb,edespino/gpdb,cjcjameson/gpdb,kaknikhil/gpdb,0x0FFF/gpdb,tpostgres-projects/tPostgres,adam8157/gpdb,cjcjameson/gpdb,cjcjameson/gpdb,Quikling/gpdb,tangp3/gpdb,greenplum-db/gpdb,yazun/postgres-xl,atris/gpdb,oberstet/postgres-xl,zeroae/postgres-xl,lisakowen/gpdb,randomtask1155/gpdb,kmjungersen/PostgresXL,ahachete/gpdb,cjcjameson/gpdb,50wu/gpdb,yuanzhao/gpdb,postmind-net/postgres-xl,Quikling/gpdb,tangp3/gpdb,arcivanov/postgres-xl,chrishajas/gpdb,snaga/postgres-xl,cjcjameson/gpdb,foyzur/gpdb,oberstet/postgres-xl,arcivanov/postgres-xl,50wu/gpdb,tangp3/gpdb,rubikloud/gpdb,CraigHarris/gpdb,ahachete/gpdb,janebeckman/gpdb,randomtask1155/gpdb,adam8157/gpdb,lintzc/gpdb,lisakowen/gpdb,arcivanov/postgres-xl,rvs/gpdb,lintzc/gpdb,rubikloud/gpdb,lpetrov-pivotal/gpdb,rvs/gpdb,chrishajas/gpdb,janebeckman/gpdb,royc1/gpdb,CraigHarris/gpdb,snaga/postgres-xl,xinzweb/gpdb,rubikloud/gpdb,ahachete/gpdb,atris/gpdb,kaknikhil/gpdb,lisakowen/gpdb,chrishajas/gpdb,zeroae/postgres-xl,lintzc/gpdb,chrishajas/gpdb,lisakowen/gpdb,chrishajas/gpdb,yazun/postgres-xl,foyzur/gpdb,atris/gpdb,lintzc/gpdb,xuegang/gpdb,rvs/gpdb,atris/gpdb,xinzweb/gpdb,tangp3/gpdb,ashwinstar/gpdb,royc1/gpdb,kaknikhil/gpdb,yazun/postgres-xl,zeroae/postgres-xl,foyzur/gpdb,kaknikhil/gpdb,Postgres-XL/Postgres-XL,Chibin/gpdb,0x0FFF/gpdb,ashwinstar/gpdb,xuegang/gpdb,Postgres-XL/Postgres-XL,snaga/postgres-xl,zeroae/postgres-xl,edespino/gpdb,ashwinstar/gpdb,yuanzhao/gpdb,yuanzhao/gpdb,oberstet/postgres-xl,0x0FFF/gpdb,lisakowen/gpdb,ashwinstar/gpdb,lintzc/gpdb,yazun/postgres-xl,CraigHarris/gpdb,janebeckman/gpdb,snaga/postgres-xl,kmjungersen/PostgresXL,Postgres-XL/Postgres-XL,CraigHarris/gpdb,xinzweb/gpdb,techdragon/Postgres-XL,CraigHarris/gpdb,zaksoup/gpdb,kaknikhil/gpdb,chrishajas/gpdb,postmind-net/postgres-xl,xinzweb/gpdb,atris/gpdb,zaksoup/gpdb,Postgres-XL/Postgres-XL,Chibin/gpdb,kaknikhil/gpdb,foyzur/gpdb,zaksoup/gpdb,royc1/gpdb,foyzur/gpdb,randomtask1155/gpdb,foyzur/gpdb,jmcatamney/gpdb,janebeckman/gpdb,pavanvd/postgres-xl,edespino/gpdb,randomtask1155/gpdb,randomtask1155/gpdb,ovr/postgres-xl,kmjungersen/PostgresXL,yuanzhao/gpdb,lintzc/gpdb,rvs/gpdb,rubikloud/gpdb,xinzweb/gpdb,xuegang/gpdb,yuanzhao/gpdb,xuegang/gpdb,lisakowen/gpdb,xuegang/gpdb,kmjungersen/PostgresXL,yuanzhao/gpdb,royc1/gpdb,randomtask1155/gpdb,Chibin/gpdb,greenplum-db/gpdb,xuegang/gpdb,arcivanov/postgres-xl,rubikloud/gpdb,techdragon/Postgres-XL,jmcatamney/gpdb,techdragon/Postgres-XL,zeroae/postgres-xl,adam8157/gpdb,royc1/gpdb,ashwinstar/gpdb,50wu/gpdb,ovr/postgres-xl,randomtask1155/gpdb,kmjungersen/PostgresXL,xuegang/gpdb,Chibin/gpdb,atris/gpdb,edespino/gpdb,edespino/gpdb,kaknikhil/gpdb,Quikling/gpdb,CraigHarris/gpdb,adam8157/gpdb,rvs/gpdb,greenplum-db/gpdb,0x0FFF/gpdb,xuegang/gpdb,tangp3/gpdb,rvs/gpdb,xinzweb/gpdb,janebeckman/gpdb,lintzc/gpdb,jmcatamney/gpdb,rubikloud/gpdb,ovr/postgres-xl,0x0FFF/gpdb,greenplum-db/gpdb,0x0FFF/gpdb,jmcatamney/gpdb,50wu/gpdb,ahachete/gpdb,postmind-net/postgres-xl,yuanzhao/gpdb,pavanvd/postgres-xl,zaksoup/gpdb,rvs/gpdb,ahachete/gpdb,arcivanov/postgres-xl,lpetrov-pivotal/gpdb,50wu/gpdb,Quikling/gpdb,chrishajas/gpdb,lpetrov-pivotal/gpdb,janebeckman/gpdb,cjcjameson/gpdb,50wu/gpdb,lisakowen/gpdb,Chibin/gpdb,tangp3/gpdb,CraigHarris/gpdb,cjcjameson/gpdb,jmcatamney/gpdb,arcivanov/postgres-xl,chrishajas/gpdb,lpetrov-pivotal/gpdb,adam8157/gpdb,xuegang/gpdb,0x0FFF/gpdb,janebeckman/gpdb,yuanzhao/gpdb,edespino/gpdb,Postgres-XL/Postgres-XL,janebeckman/gpdb,randomtask1155/gpdb,lpetrov-pivotal/gpdb,tpostgres-projects/tPostgres,Chibin/gpdb,Quikling/gpdb,Chibin/gpdb,snaga/postgres-xl,zaksoup/gpdb,greenplum-db/gpdb,Quikling/gpdb,cjcjameson/gpdb,rubikloud/gpdb,jmcatamney/gpdb,greenplum-db/gpdb,ahachete/gpdb,foyzur/gpdb,yazun/postgres-xl,foyzur/gpdb,tpostgres-projects/tPostgres,kaknikhil/gpdb,50wu/gpdb,edespino/gpdb,lintzc/gpdb,Quikling/gpdb,Chibin/gpdb,adam8157/gpdb,lintzc/gpdb,rubikloud/gpdb,postmind-net/postgres-xl,ashwinstar/gpdb,techdragon/Postgres-XL,royc1/gpdb,yuanzhao/gpdb,greenplum-db/gpdb,edespino/gpdb,atris/gpdb,xinzweb/gpdb,pavanvd/postgres-xl,kaknikhil/gpdb,zaksoup/gpdb,ovr/postgres-xl,kaknikhil/gpdb,zaksoup/gpdb,techdragon/Postgres-XL,lpetrov-pivotal/gpdb,royc1/gpdb,ovr/postgres-xl,oberstet/postgres-xl,Chibin/gpdb,adam8157/gpdb,lisakowen/gpdb,Quikling/gpdb,Quikling/gpdb,ashwinstar/gpdb,tpostgres-projects/tPostgres,lpetrov-pivotal/gpdb,rvs/gpdb,jmcatamney/gpdb,rvs/gpdb,atris/gpdb,ahachete/gpdb,50wu/gpdb,edespino/gpdb,Chibin/gpdb,0x0FFF/gpdb,cjcjameson/gpdb,greenplum-db/gpdb,xinzweb/gpdb,jmcatamney/gpdb,CraigHarris/gpdb,rvs/gpdb,tangp3/gpdb,edespino/gpdb,pavanvd/postgres-xl,yuanzhao/gpdb,zaksoup/gpdb,janebeckman/gpdb,oberstet/postgres-xl,tpostgres-projects/tPostgres,ashwinstar/gpdb,tangp3/gpdb,janebeckman/gpdb,cjcjameson/gpdb,lpetrov-pivotal/gpdb,adam8157/gpdb,Quikling/gpdb,postmind-net/postgres-xl,ahachete/gpdb,pavanvd/postgres-xl