Git commits in Moodle 3.1.5 by Dani Palou

commit 8163446fee349e975980590402aaf7e59c47da18
Author: Dani Palou <dani@moodle.com>
Date:   Tue, 14 Feb 2017 17:28:33 +0800
Tag:    v3.1.5

MDL-57962 forum: Allow creating new discussions with groupid -1