Support for separate Keystone paste.deploy configuration
Support for separate Keystone paste.deploy configuration

Support for Keystone change https://review.openstack.org/24126
while keeping the backward compatiblity with mixed cfg/paste.deploy
configuration file.

Also remove insertion of s3 extension which was merged in
https://github.com/openstack/keystone/commit/b2aa620bc9d040f803c49707237f43ff1a04ef93

Change-Id: Ib7e2913ebb507f882dcd71b1142bcdb4b040ae6b

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