Set use_keystoneauth param in keystone.client identity

Change-Id: Ia8b0796a671724284fdae048726349c2e9169782
diff --git a/keystone/client/core.yml b/keystone/client/core.yml
index 2b608ac..39d28de 100644
--- a/keystone/client/core.yml
+++ b/keystone/client/core.yml
@@ -37,3 +37,4 @@
             host: ${_param:keystone_service_host}
             port: 5000
             region_name: ${_param:openstack_region}
+            use_keystoneauth: true