Author: David Monllao
MDL-43450 behat: Checking the ->behat_* vars contents before showing the steps list
http://git.moodle.org/gw?p=moodle.git;a=commit;h=7e3f5e79d0108fe8e3444524a003bc75e6626d04
http://github.com/moodle/moodle/commit/7e3f5e79d0108fe8e3444524a003bc75e6626d04
+ 2.7 en [erroruniqueconfig,tool_behat]