Integrate possibility to call inaccessible methods in BaseTestCase
The BaseTestCase already has a possibility to create full blown accessible object proxies.
However if one does not want to have the class stack cluttered with temporary existing classes, there shall be a possibility to directly invoke protected/private methods of a fixture object.
The new method callInaccessibleMethod method is taken and rewritten from ModuleControllerTest.
Example to use it in unit tests:
$this->fixture = new \TYPO3\CMS\Core\SomeClassName();
$result = $this->callInaccessibleMethod($this->fixture, 'privateMethod', $first, $second, $third, ...);