Git commits in Moodle 3.10.4 by Tim Schroeder

commit 062dc30ffd507f88d262aaaa7cbfd5d71c64c048
Author: Tim Schroeder <t.schroeder@itc.rwth-aachen.de>
Date:   Tue, 03 Nov 2020 18:53:32 +0800
Tag:    v3.10.4

MDL-70110 assign: fixed ws get_submissions for groups