Update docs/languages/en/modules/zend.test.phpunit.rst

assertModule to assertModuleName. Was changed in commit https://github.com/zendframework/zf2/commit/fa71329a155ec3ae5bdc045ac74d26c98365432b#library/Zend/Test/PHPUnit/Controller/AbstractControllerTestCase.php
Merge pull request #665 from mtdavidson/patch-2

Update docs/languages/en/modules/zend.test.phpunit.rst