Git commits in Moodle 3.5.3 by Eric Merrill

commit f55f89162dc08c1815aa4585aa536379209db5bf
Author: Eric Merrill <merrill@oakland.edu>
Date:   Tue, 09 Oct 2018 03:46:28 +0800
Tag:    v3.5.3

MDL-63456 qtype_multichoice: Return a default options object if missing

commit 2d5d5d79027ad430c8cc8ad7b30fd9059e4125f9
Author: Eric Merrill <merrill@oakland.edu>
Date:   Wed, 26 Sep 2018 11:35:37 +0800
Tag:    v3.5.3

MDL-63456 question: Improve Aiken error handling and multichoice errors