use setup_install for django_openstack_auth
use setup_install for django_openstack_auth

This is fundamentally a library. As such we should setup_install
so that we can possibly pin it, otherwise we *always* get the
git version instead.

Change-Id: Ia815f2675cf535bb05a7e8eda853690171559b86

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