Git commits in Moodle 3.6.5 by Mark Nelson

commit 885b98991b7941cb5e1ac3e2d9864fbc35390d8a
Author: Mark Nelson <mdjnelson@gmail.com>
Date:   Thu, 27 Jun 2019 15:59:42 +0800
Tag:    v3.6.5

MDL-65101 core_message: add Behat test


commit 1ba6407a66c6b14feec65ab55b797bbade24753d
Author: Mark Nelson <mdjnelson@gmail.com>
Date:   Tue, 18 Jun 2019 15:18:01 +0800
Tag:    v3.6.5

MDL-65101 core_message: 'canmessage' should trump 'requirescontract'