Git commits in Moodle 3.9.x by Claude Vervoort

commit b33e8c852423b14b155d529575c7494f6fd639e8
Author: Claude Vervoort <claude.vervoort@gmail.com>
Date:   Mon, 09 Mar 2020 08:59:29 +0800
Tag:    v3.9.0-beta

MDL-65306 mod_lti: preserve resourceid restoring older backups