Git commits in Moodle 3.3.8 by sarjona

commit 939ba8562b22e7d3d0549be144e1978827916f4f
Author: sarjona <sara@moodle.com>
Date:   Mon, 30 Jul 2018 19:26:33 +0800
Tag:    v3.3.8

MDL-62800 tool_policy: Merge the policy tool to 3.3