Git commits in Moodle 2.3.5 by Michael Aherne

commit 5a701d1fbe0ec4f1c2ceb6cb38ccc26fa709f324
Author: Michael Aherne <michael.aherne@strath.ac.uk>
Date:   Fri, 11 Jan 2013 19:12:33 +0800
Tag:    v2.3.5

MDL-27164 groups Do not show multiple instances of the same role as multiple