Use v3 for keystone.client

Change-Id: I72d524f5183e71059056afd81035c095f818d5cb
diff --git a/classes/cluster/virtual-mcp11-aio/openstack/init.yml b/classes/cluster/virtual-mcp11-aio/openstack/init.yml
index 57fa0d6..c6e0974 100755
--- a/classes/cluster/virtual-mcp11-aio/openstack/init.yml
+++ b/classes/cluster/virtual-mcp11-aio/openstack/init.yml
@@ -284,6 +284,12 @@
         port: ${_param:rabbitmq_port}
         ssl:
           enabled: ${_param:rabbitmq_ssl_enabled}
+    client:
+      enabled: true
+      server:
+        identity:
+          admin:
+            api_version: 3
   heat:
     server:
       database: