Author: David Monllao
MDL-38007 behat: Refining error texts
Also removing a couple of silly notices
http://git.moodle.org/gw?p=moodle.git;a=commit;h=6fe3986deca218afc375e814badc6bf4f7c48529
http://github.com/moodle/moodle/commit/6fe3986deca218afc375e814badc6bf4f7c48529
+ 2.5 en [wrongbehatsetup,tool_behat]