contrail-webui: enable ssl auth for openstack services

Fixes:
- determine default parameter for identity protocol.
- fix documentation.

Change-Id: I07a82064178e466c017cb18c64a405e683a5493c
Related-PROD: PROD-29221 (PROD:29221)
diff --git a/metadata/service/client/cluster.yml b/metadata/service/client/cluster.yml
index 5defad9..91043a9 100644
--- a/metadata/service/client/cluster.yml
+++ b/metadata/service/client/cluster.yml
@@ -3,6 +3,7 @@
 parameters:
   _param:
     opencontrail_version: 3.0
+    opencontrail_identity_protocol: http
     opencontrail_identity_port: 35357
     opencontrail_identity_version: '2.0'
     openstack_control_address: 127.0.0.1