Fix for psort temp file names, from Vadim.
Fix for psort temp file names, from Vadim.

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