Update Codeception to 2.2.1

[javigomez]

@pritalpatel since Codeception 2.2.1 has been released (http://codeception.com/06-03-2016/codeception-2.2-is-here.html) you can send a pull request to change this line: https://github.com/joomla-projects/gsoc16_browser-automated-tests/blob/staging/tests/composer.json#L23 to:

"codeception/codeception": "~2.2",

[pritalpatel]

OK javi, I will change it. 👍

[yvesh]

Done by Prital