Git commits in Moodle 2.8.x by Luke Carrier

commit 2af7590d988e7b3e4f50364e707835723be57e0c
Author: Luke Carrier <Luke.Carrier@floream.com>
Date:   Tue, 16 Jun 2015 19:11:18 +0800
Tag:    v2.8.7

MDL-50611 test: use cURL extension to download Composer