Fix logic to prevent pg_dump from dumping system schemas; bug introduced in recent -t/-n/-T/-N patch.
Fix logic to prevent pg_dump from dumping system schemas; bug introduced
in recent -t/-n/-T/-N patch.

Small style cleanups.

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