Git commits in Moodle 3.3.x by Chernyavskiy Leonid

commit 14618260c82a8236bfbcd3c94b7284c8b3d662e7
Author: Chernyavskiy Leonid <chernyavskiy.leonid@gmail.com>
Date:   Thu, 21 Dec 2017 11:46:09 +0800
Tag:    v3.3.5

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