Git commits in Moodle 3.0.7 by Sam Wilson

commit 89b8a5c82f7b9d6882ed85c5ba5aee864ad29375
Author: Sam Wilson <sam@samwilson.id.au>
Date:   Thu, 16 Jun 2016 20:40:13 +0800
Tag:    v3.0.7

MDL-29774 core_user: Update group-membership summaries on AJAX calls