Support enabled for keystone

This commit adds support for keystone servers
running in passive mode.

manifests/keystone.pp

@@ -49,6 +49,7 @@ class openstack::keystone (
     enabled      => $enabled,
   }
 
+  if ($enabled) {
     # Setup the admin user
     class { 'keystone::roles::admin':
       email        => $admin_email,
@@ -82,6 +83,7 @@ class openstack::keystone (
         internal_address => $internal_address,
       }
     }
+  }
 
   # Configure the Keystone database
   case $db_type {