Git commits in Moodle 3.9.x by Tien Nguyen Phuc

commit bc6efcb4378152f197146438adecbc7cc8096baf
Author: Tien Nguyen Phuc <nguyenphuctien@gmail.com>
Date:   Wed, 08 Jan 2020 16:31:46 +0800
Tag:    v3.9.0-beta

MDL-67638 Course: update course timemodified on bulk category move