Git commits in Moodle 3.3.0 by John Beedell

commit 8b0d254f0562330846f1a28d79e86866b0ce148f
Author: John Beedell <john.beedell@open.ac.uk>
Date:   Thu, 05 Jan 2017 22:34:41 +0800
Tag:    v3.3.0-beta

MDL-57511 Quiz: Attempts report shows non-unique debugging