Ensure that FK constraints are dumped after primary/unique constraints, rather than relying on OID order of pg_constraint entries.  Per gripe from Greg Stark.
Ensure that FK constraints are dumped after primary/unique constraints,
rather than relying on OID order of pg_constraint entries.  Per gripe
from Greg Stark.

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