Git commits in Moodle 3.4.3 by Dan Marsden

commit e819de5611ba2dc38c60c69a5b98464e47e8e0b1
Author: Dan Marsden <dan@danmarsden.com>
Date:   Thu, 15 Mar 2018 08:28:07 +0800
Tag:    v3.4.3

MDL-59857 mod_scorm: use valid length for grade type field.