Git commits in Moodle 3.3.3 by Pat Kira

commit 74ee81e38e91e9a779b4b0227ce9f8fc5bec1f72
Author: Pat Kira <pat.kira@catalyst.net.nz>
Date:   Wed, 20 Sep 2017 09:20:21 +0800
Tag:    v3.3.3

MDL-60342 test: Reset user agent after tests