Remove use of nonexistent postgresql-setup.
Remove use of nonexistent postgresql-setup.

On Ubuntu the default postgresql data directory is not
/var/lib/pgsql/data so the check to see if that directory
exists is not needed. On Fedora we can assume that the rpm will
create it and initialize it properly. So this line can safely
removed without any issues.

Change-Id: If949f0580eb139f3803b698ee88fceebf958448e

bigswitch/devstack,neerja28/Devstack_GlusterFS,srics/devstack,parul24/devstack,avvocatodemarchis/devstack,prithivm/branch01,costingalan/devstack,deepakselvaraj/devstack,upadhyay-prashant/devstack,promptworks/devstack,herrsechs/devstack,citrix-openstack-build/devstack,sequenceiq/devstack,cloudbuilders/devstack,openstack-dev/devstack,vishnugonela/devstack,vsham20/devstack,bigswitch/devstack,kplus/devstack-moonshot,bswartz/devstack,rushiagr/devstack,affo/devstack,kplus/devstack-moonshot,sc68cal/devstack,pczerkas/devstack,dirkmueller/devstack,herrsechs/devstack,noironetworks/devstack,nuxeh/devstack,group-policy/devstack,Mahito/devstack,group-policy/devstack,noironetworks/devstack,Juniper/devstack,upadhyay-prashant/devstack,cloudbuilders/devstack,wenhuizhang/devstack,samgoon/devstack,ewindisch/raspi-devstack,Yuriy-Leonov/devstack,wenhuizhang/devstack,vishnugonela/devstack,CiscoSystems/devstack,openstack-dev/devstack,bswartz/devstack,olivierlemasle/devstack,affo/devstack,flavio-fernandes/devstack,Millnert/contrail-devstack,tianweizhang/devstack,pombredanne/devstack,bq-xiao/devstack,sequenceiq/devstack,nawawi/openstack,shootstar/devstacktest,HPCHub/devstack,dtroyer/devstack,CloudServer/devstack,TwinkleChawla/devstack,mmasaki/devstack,atulpatil301/devstack,ozamiatin/devstack,nawawi/openstack,armando-migliaccio/devstack,flavio-fernandes/devstack,thomasem/devstack,tianweizhang/devstack,BSJAIN92/OpenStack,varunarya10/devstack,nuxeh/devstack,CloudServer/devstack,bljgaurav/openstack-test,mssumanth/devstack,sc68cal/devstack,mc2014/devstack,Mahito/devstack,vsham20/devstack,olivierlemasle/devstack,mssumanth/devstack,samgoon/devstack,j4/devstack,pacinete/devstack,sstrato/devstack,mc2014/devstack,richliu/devstack,eshnil2000/devstack,j4/devstack,prithivm/branch01,liuquansheng47/devstack,pczerkas/devstack,rushiagr/devstack,promptworks/devstack,richliu/devstack,parul24/devstack,neerja28/Devstack_GlusterFS,dtroyer/devstack,BSJAIN92/OpenStack,pacinete/devstack,pombredanne/devstack,costingalan/devstack,avvocatodemarchis/devstack,mmasaki/devstack,JioCloud/devstack,varunarya10/devstack,ewindisch/raspi-devstack,ozamiatin/devstack,NaokiMiyata/devstack,virtualopensystems/devstack,TwinkleChawla/devstack,bljgaurav/openstack-test,LoHChina/devstack,HPCHub/devstack,liuquansheng47/devstack,eharney/devstack,innodee/openstackk,jamielennox/devstack,NaokiMiyata/devstack,bq-xiao/devstack,andrewrothstein/devstack,eharney/devstack,andrewrothstein/devstack,thomasem/devstack,LoHChina/devstack,citrix-openstack-build/devstack,williamthegrey/devstack,dirkmueller/devstack,inkerra/devstack,yamt/devstack,atulpatil301/devstack