Git commits in Moodle 2.5.9 by Adrian Greeve

commit cc375a22b95b2e0f927a21ffd97c06f2276d8c14
Author: Adrian Greeve <adrian@moodle.com>
Date:   Tue, 28 Oct 2014 10:20:37 +0800
Tag:    v2.5.9

MDL-47697 mod_data: Fix group id change when editing.