Git commits in Moodle 3.4.2 by Chernyavskiy Leonid

commit 24112d09b90a8248d3ffeb12ca2da7c517374a2e
Author: Chernyavskiy Leonid <chernyavskiy.leonid@gmail.com>
Date:   Thu, 21 Dec 2017 11:46:09 +0800
Tag:    v3.4.2

MDL-60658 course, gradebook: fix missing unformat_float for gradepass