Git commits in Moodle 3.2.3 by Cameron Ball

commit fba8a2e290d3055a19e83cf43572a535ba229e42
Author: Cameron Ball <cameron@moodle.com>
Date:   Wed, 12 Apr 2017 17:31:00 +0800
Tag:    v3.2.3

MDL-58514 mod_assign: Apply consistent logic for overrides