Reset all calibrators for the specified parameter to their original MDB value.

def reset_calibrators(self, parameter):
        """
        Reset all calibrators for the specified parameter to their original MDB value.
        """
        req = mdb_pb2.ChangeParameterRequest()
        req.action = mdb_pb2.ChangeParameterRequest.RESET_CALIBRATORS                  
        calib_info = req.defaultCalibrator
        url = '/mdb/{}/{}/parameters/{}'.format(
            self._instance, self._processor, parameter)
        response = self._client.post_proto(url, data=req.SerializeToString())