Git commits in Moodle 3.6.8 by Tim Hunt

commit 5884f9a07b583ab6728fbdf03d586cd5a16e52d9
Author: Tim Hunt <T.J.Hunt@open.ac.uk>
Date:   Fri, 26 Apr 2019 03:57:44 +0800
Tag:    v3.6.8

MDL-48024 behat: allow plugins to have data generators