Updates the Flask app with Error Handlers for different Error Codes

def _construct_error_handling(self):
        """
        Updates the Flask app with Error Handlers for different Error Codes

        """
        self._app.register_error_handler(500, LambdaErrorResponses.generic_service_exception)
        self._app.register_error_handler(404, LambdaErrorResponses.generic_path_not_found)
        self._app.register_error_handler(405, LambdaErrorResponses.generic_method_not_allowed)