Gets result back from Salesforce as whatever type was originally sent in create_batch (xml, or csv).
        :param job_id:
        :param batch_id:
        :param result_id:

def get_batch_result(self, job_id, batch_id, result_id):
        """
        Gets result back from Salesforce as whatever type was originally sent in create_batch (xml, or csv).
        :param job_id:
        :param batch_id:
        :param result_id:

        """
        response = requests.get(self._get_batch_result_url(job_id, batch_id, result_id),
                                headers=self._get_session_headers())
        response.raise_for_status()

        return response.content