Fixed namespace.

app/controllers/getting_started_controller.rb

@@ -977,12 +977,12 @@ curl http://localhost/api/v1/getting_started -v -u #{login}:#{password}
       system_online_service: Setting.get('system_online_service'),
       addresses: addresses,
       groups: groups,
-      config: config,
+      config: config_to_update,
     }
     true
   end
 
-  def config
+  def config_to_update
     {
       product_logo: Setting.get('product_logo')
     }