Move export PGDATA to the proper place.  Quote some variable substitutions.
Move export PGDATA to the proper place.  Quote some variable substitutions.

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