Git commits in Moodle 3.7.0 by eWallah

commit 35154fa1b53775c731a3084f06aad78a6e4b1052
Author: eWallah <info@eWallah.net>
Date:   Tue, 02 Apr 2019 15:40:46 +0800
Tag:    v3.7.0-rc1

MDL-65224 customfield: Use @_file_upload tag when uploading a file

commit 7ef5409b1bd598ce9e97ad8edb706c3b8817b244
Author: eWallah <info@eWallah.net>
Date:   Tue, 22 Jan 2019 22:47:14 +0800
Tag:    v3.7.0-beta

MDL-63168 core_message: fix failures in migrate_message_data task.

commit c172d58769504926cec27b2356f807d252b35c12
Author: eWallah <info@eWallah.net>
Date:   Sun, 20 Jan 2019 23:30:50 +0800
Tag:    v3.7.0-beta

MDL-64633 behat: fix FormatterNotFoundException when updating steps.