Git commits in Moodle 3.4.8 by Mark Nelson

commit a9d153e61d155b3b5151c9261734315eba773403
Author: Mark Nelson <markn@moodle.com>
Date:   Wed, 23 Jan 2019 13:43:05 +0800
Tag:    v3.4.8

MDL-64644 completion: fixed assertions in privacy test

commit c2c8ce4b6d72df648dd288b55aecef9b4acdfb03
Author: Mark Nelson <markn@moodle.com>
Date:   Wed, 23 Jan 2019 13:42:01 +0800
Tag:    v3.4.8

MDL-64644 completion: set status correctly in provider

commit 27f608a5c9a641c6bc3fb496ba174c3ed132b70d
Author: Mark Nelson <markn@moodle.com>
Date:   Wed, 23 Jan 2019 13:39:29 +0800
Tag:    v3.4.8

MDL-64644 completion: ensure we return array for provider

commit 1a3612bb5b88eaebcbbbb95ec753740d01c081a2
Author: Mark Nelson <markn@moodle.com>
Date:   Wed, 27 Jun 2018 15:28:42 +0800
Tag:    v3.4.8

MDL-62702 core_lib: updated the 'ltiprovider' readme_moodle.txt