Git commits in Moodle 3.8.x by Russell Boyatt

commit a860a76a680291a5d8faa6dcf86d098534a88ba7
Author: Russell Boyatt <russell.boyatt@warwick.ac.uk>
Date:   Tue, 09 Jun 2020 16:50:34 +0800
Tag:    v3.8.4

MDL-66899 quiz: Adding test for regrading quiz event.


commit 28509546d368f15337b38adc36e323fb06a66e4f
Author: Russell Boyatt <russell.boyatt@warwick.ac.uk>
Date:   Sat, 02 May 2020 16:47:51 +0800
Tag:    v3.8.4

MDL-66899 quiz: Log a regrading event when quiz attempt is regraded.