Git commits in Moodle 2.9.1 by Luke Carrier

commit 0e1a2090b845df81b8836a1f839d3ec4cdc5ee4f
Author: Luke Carrier <Luke.Carrier@floream.com>
Date:   Tue, 16 Jun 2015 19:11:18 +0800
Tag:    v2.9.1

MDL-50611 test: use cURL extension to download Composer