Git commits in Moodle 3.6.5 by Marina Glancy

commit fd37432a6ebd37922305315b11d4be0104637dcb
Author: Marina Glancy <marina@moodle.com>
Date:   Wed, 29 May 2019 16:28:03 +0800
Tag:    v3.6.5

MDL-65726 core_roles: allow to create roles in install.php

commit df597afcfb627c527e38401f4867d8e8b1402700
Author: Marina Glancy <marina@moodle.com>
Date:   Tue, 28 May 2019 15:30:55 +0800
Tag:    v3.6.5

MDL-65726 role: do not fail unittest if plugins create their roles