Git commits in Moodle 3.2.2 by Adam Olley

commit 9ffcf8a3e91ed618ba52480999a53aa6282a0695
Author: Adam Olley <adam.olley@blackboard.com>
Date:   Tue, 21 Feb 2017 12:01:19 +0800
Tag:    v3.2.2

MDL-58030 gradingform_guide: Init $commentchooser before use