Git commits in Moodle 3.0.7 by sam marshall

commit 08e3be88064e06d30a171d98aaae82f5928eec8d
Author: sam marshall <s.marshall@open.ac.uk>
Date:   Tue, 20 Sep 2016 21:49:10 +0800
Tag:    v3.0.7

MDL-56038 Web services: json_last_error_msg not in PHP 5.4