Git commits in Moodle 3.7.2 by Neill Magill

commit 8b0bf17160d99d54e9c38904f30d818f43f054a0
Author: Neill Magill <neill.magill@nottingham.ac.uk>
Date:   Wed, 21 Aug 2019 16:02:03 +0800
Tag:    v3.7.2

MDL-65443 core: Improve class descriptions for locking events


commit 3aa7b0df78f358f97829d74685887876c48e60c7
Author: Neill Magill <neill.magill@nottingham.ac.uk>
Date:   Fri, 09 Aug 2019 18:27:40 +0800
Tag:    v3.7.2

MDL-65443 core: Log when a context is locked or unlocked