Author: David Monllao
MDL-37046 behat: Adding switch environment feature
http://git.moodle.org/gw?p=moodle.git;a=commit;h=cc5446464e4fa01d9548c18a14028fdcad391eeb
http://github.com/moodle/moodle/commit/cc5446464e4fa01d9548c18a14028fdcad391eeb
+ 2.5 en [commandswitchenvironment,tool_behat]
+ 2.5 en [switchenvironmentinfo,tool_behat]
+ 2.5 en [switchenvironmentenable,tool_behat]
+ 2.5 en [switchenvironmentdisable,tool_behat]