Author: David Monllao
MDL-43738 behat: More info about how to get/set fields
http://git.moodle.org/gw?p=moodle.git;a=commit;h=decf1e14c8bcb4aa6b55511b7e4daa37c83145d0
http://github.com/moodle/moodle/commit/decf1e14c8bcb4aa6b55511b7e4daa37c83145d0
+ 2.7 en [fieldvalueargument,tool_behat]
+ 2.7 en [fieldvalueargument_help,tool_behat]