Git commits in Moodle 3.6.5 by Amaia Anabitarte

commit 8f03499b61f41d02a4a8cded53fc2e8f3f69f84d
Author: Amaia Anabitarte <amaia@moodle.com>
Date:   Mon, 20 May 2019 21:39:41 +0800
Tag:    v3.6.5

MDL-65060 core_message: Delete messages behat test


commit 9ee809d685869a152f787d7cd05cfc489ea7cac6
Author: Amaia Anabitarte <amaia@moodle.com>
Date:   Mon, 20 May 2019 21:39:13 +0800
Tag:    v3.6.5

MDL-65060 core_message: Group message data generator


commit 9772b2e138d7ed24fb0a1de3d591a07275336cb7
Author: Amaia Anabitarte <amaia@moodle.com>
Date:   Mon, 20 May 2019 21:38:54 +0800
Tag:    v3.6.5

MDL-65060 core_message: Group_message_message_content selector