iser network portal attribute not saved in v3.0 configuration file

[nablio3000]

The current ../iscsi/$IQN/$TPGT/np/$IP:$PORT/iser configfs attribute value is not being saved into /etc/target/scsi_target.lio, and is being lost across target restart.

As reported by: http://www.spinics.net/lists/target-devel/msg09832.html