Fix grammar of new error message.
Fix grammar of new error message.

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