Git commits in Moodle 2.7.1 by Mohamed Alsharaf

commit 184cdf0d52fe1bb8f2273139e589b371b3f850da
Author: Mohamed Alsharaf <mohamed.alsharaf@gmail.com>
Date:   Fri, 11 Apr 2014 07:14:51 +0800
Tag:    v2.7.1

MDL-45192 assign: added behat script & new definitions to handle alert dialog