Git commits in Moodle 3.9.x by Laurent David

commit 4cb39164fa3b28e64422464ba86fda001444c5e3
Author: Laurent David <laurent.david@moodle.com>
Date:   Thu, 21 Jul 2022 01:00:18 +0800
Tag:    v3.9.16

MDL-75210 mod_quiz: fix sequential quiz access


commit 32ee8e3d34359ceb20894a7b5bd4b42ddb4f6418
Author: Laurent David <lmedavid@gmail.com>
Date:   Mon, 16 May 2022 13:35:21 +0800
Tag:    v3.9.15

MDL-74473 core_analytics: Upgrade ML Backend to 2.6.6


commit 0e73be46c0d99a2d66be04058e1379125c13d94d
Author: Laurent David <lmedavid@gmail.com>
Date:   Thu, 23 Sep 2021 23:39:34 +0800
Tag:    v3.9.11

MDL-72496 question tests: fix assertTag if tag not found