Update stack.sh to use openstackclient commands
Update stack.sh to use openstackclient commands

There were a few instances of keystoneclient still being used,
these were replaced with their openstackclient equivalent.

Change-Id: I47fb7cf949b9ab054b97ae387ecbc6d7070fa9c3

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