Git commits in Moodle 3.3.x by Ann Adamcik

commit 287089b1a2faa5feabb2512eab3a7517eb4b26fe
Author: Ann Adamcik <adamann2@isu.edu>
Date:   Sat, 02 Dec 2017 03:48:44 +0800
Tag:    v3.3.6

MDL-58697: Only get group submission if enabled