Git commits in Moodle 3.1.14 by Tim Hunt

commit da1eeea0ff3d292b7669e478abc114872dd9cc8f
Author: Tim Hunt <T.J.Hunt@open.ac.uk>
Date:   Tue, 10 Jul 2018 01:37:45 +0800
Tag:    v3.1.14

MDL-62880 qtype_ddwtos: drop support for legacy import format