Add a delayed_assert failure into a list for future processing.

def __add_delayed_assert_failure(self):
        """ Add a delayed_assert failure into a list for future processing. """
        current_url = self.driver.current_url
        message = self.__get_exception_message()
        self.__delayed_assert_failures.append(
            "CHECK #%s: (%s)\n %s" % (
                self.__delayed_assert_count, current_url, message))