Make iscsi config.yml consistent with start.yml

As part of non-lvm iscsi bugfix, changes were introduced
to iscsi's start.yml. Same changes/conditions should be
reflected to config.yml so container configuration is deployed on
the same nodes as containers are started.

TrivialFix

Change-Id: Ib988df2d36983d63a3aff4226224dc5fc6064221