parametrize endpoints

Change-Id: I6083b410969f35ad87d36a53e11016c699155291
diff --git a/tests/pillar/server_cluster.sls b/tests/pillar/server_cluster.sls
index 52c527f..e543e5b 100644
--- a/tests/pillar/server_cluster.sls
+++ b/tests/pillar/server_cluster.sls
@@ -15,6 +15,7 @@
       tenant: service
       user: ceilometer
       password: password
+      endpoint_type: internalURL
     message_queue:
       engine: rabbitmq
       members: