Make pg_dump --oids work when default_with_oids = off.  Per report from Michael Fuhr.
Make pg_dump --oids work when default_with_oids = off.  Per report from
Michael Fuhr.

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