Git commits in Moodle 3.4.0 by Stephen Bourget

commit f5de9484e85117b0e6b9489d08febfe48e5efca0
Author: Stephen Bourget <steve.bourget@sau19.org>
Date:   Wed, 16 Aug 2017 02:10:38 +0800
Tag:    v3.4.0-beta

MDL-53537 core_backup: Add a course_backup_created event