Unhardcode protocol on auth_url

This patch makes available to configure protocol on
auth_url.

Change-Id: I7d5539f9112b8a3739fb6ae88c49980c655f0deb
diff --git a/metadata/service/server/cluster.yml b/metadata/service/server/cluster.yml
index fd80ebd..1088421 100644
--- a/metadata/service/server/cluster.yml
+++ b/metadata/service/server/cluster.yml
@@ -6,6 +6,7 @@
   _param:
     openstack_log_appender: false
     openstack_fluentd_handler_enabled: false
+    cluster_internal_protocol: http
   keystone:
     server:
       enabled: true
@@ -20,6 +21,7 @@
         address: ${_param:cluster_local_address}
         private_address: ${_param:cluster_vip_address}
         private_port: 35357
+        private_protocol: ${_param:cluster_internal_protocol}
         public_address: ${_param:cluster_vip_address}
         public_port: 5000
       region: RegionOne