Git commits in Moodle 3.2.4 by Andres

commit e2b4084bfd3373e4f2a51df2ed95616b979f7a3b
Author: Andres <andres.torres@blackboard.com>
Date:   Fri, 19 May 2017 11:22:45 +0800
Tag:    v3.2.4

MDL-46322 mod_assign: Only list enrolled graders as potential markers