Use stackhpc downstream keystone

Author: seunghun1ee

etc/kayobe/kolla.yml

@@ -138,7 +138,7 @@ kolla_sources:
   keystone-base:
     type: git
     location: https://github.com/stackhpc/keystone.git
-    reference: smslab/{{ openstack_release }}
+    reference: stackhpc/{{ openstack_release }}
   magnum-base:
     type: git
     location: https://github.com/stackhpc/magnum.git