Git commits in Moodle 3.6.4 by M

commit d4fc00666b9bed30cfcda50d35cbe4b668fcc291
Author: M <12033826+maksudr@users.noreply.github.com>
Date:   Wed, 20 Mar 2019 03:29:21 +0800
Tag:    v3.6.4

MDL-65038 core_files: Fix typo in function mock_response