enable tests again

tests/PHPUnit/Core/ReleaseCheckListTest.php

@@ -12,7 +12,6 @@ class ReleaseCheckListTest extends PHPUnit_Framework_TestCase
 {
     public function setUp()
     {
-        $this->markTestSkipped();
         $this->globalConfig = _parse_ini_file(PIWIK_PATH_TEST_TO_ROOT . '/config/global.ini.php', true);
         parent::setUp();
     }