Fix dependency generation for multicolumn foreign keys.  From Adam Buraczewski.
Fix dependency generation for multicolumn foreign keys.  From Adam Buraczewski.

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