add username for mock credentials of openid in development

app/models/user.rb

@@ -106,6 +106,7 @@ class User < ActiveRecord::Base
     if user.new_record?
       user.email = auth.info.email
       user.name = auth.info.name
+      user.username = auth.info.username
       user.password = Devise.friendly_token[0, 20]
       user.skip_confirmation!
     end