Git commits in Moodle 2.7.1 by Albert Gasset

commit ae916b5d6a146bdbfda9f9d6cb437c01e876d5a3
Author: Albert Gasset <albert.gasset@gmail.com>
Date:   Thu, 02 May 2013 15:38:46 +0800
Tag:    v2.7.1

MDL-35514 mod_forum: Fixed warning message to students in forums with groups