Git commits in Moodle 3.1.0 by Amanda Doughty

commit 692ef1010b4a17afcc46071410c0c66d183ddc63
Author: Amanda Doughty <amanda.doughty.1@city.ac.uk>
Date:   Mon, 14 Dec 2015 04:43:26 +0800
Tag:    v3.1.0-beta

MDL-52455 quiz: doesn't include all user fields required by messaging