Throw error if initdb -L is not an absolute path.
Throw error if initdb -L is not an absolute path.

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