docs: def set_iscsi_initiator_info(self, initiator_iqn):
          """Set iSCSI initiator information in iLO.
  
          :param initiator_iqn: Initiator iqn for iLO.
          :raises: IloError, on an error from iLO.
          :raises: IloCommandNotSupportedError, if the system is
                   in the bios boot mode.
          """
          if(self._is_boot_mode_uefi() is True):
              iscsi_uri = self._check_iscsi_rest_patch_allowed()
              initiator_info = {'iSCSIInitiatorName': initiator_iqn}
              status, headers, response = self._rest_patch(iscsi_uri,
                                                           None, initiator_info)
              if status >= 300:
                  msg = self._get_extended_error(response)
                  raise exception.IloError(msg)
          else:
              msg = 'iSCSI initiator cannot be set in the BIOS boot mode'
              raise exception.IloCommandNotSupportedError(msg)