Since a missing pg_pwd file is a valid situation, don't print an error message in that case.
Since a missing pg_pwd file is a valid situation, don't print an error
message in that case.

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