Git commits in Moodle 3.2.x by Sam Wilson

commit 813c0590f7f6aed0e5645284daa3821e2bd898c4
Author: Sam Wilson <sam@samwilson.id.au>
Date:   Thu, 16 Jun 2016 20:40:13 +0800
Tag:    v3.2.0-beta

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