'After tests are finished removes things created in setUpClass'

@classmethod
def tearDownClass(cls):

    if os.path.exists(cls.role_dir):
        shutil.rmtree(cls.role_dir)
    if os.path.exists(cls.role_req):
        os.remove(cls.role_req)
    if os.path.exists(cls.role_tar):
        os.remove(cls.role_tar)
    if os.path.isdir(cls.role_path):
        shutil.rmtree(cls.role_path)
