Zend\Test needs Zend\Code as dependency

see Zend/Test/PHPUnit/Controller/AbstractControllerTestCase.php, [lline 13](https://github.com/zendframework/zf2/blob/master/library/Zend/Test/PHPUnit/Controller/AbstractControllerTestCase.php#L13) and [line 58](https://github.com/zendframework/zf2/blob/master/library/Zend/Test/PHPUnit/Controller/AbstractControllerTestCase.php#L58).