Git commits in Moodle 3.1.6 by Simey Lameze

commit 637b3ff3de67568535ec2cd0536fa43ce37d1781
Author: Simey Lameze <simey@moodle.com>
Date:   Tue, 11 Apr 2017 11:21:38 +0800
Tag:    v3.1.6

MDL-58559 block_community: check if the course has subject