packaging: setup: avoid iptables override on AIO

When adding the host within AIO plugin, avoid to try
to override iptables config. Overriding iptables
could conflict with firewalld configuration of the host
and is already done by the installer.

Change-Id: Iceeff7953520edd293fa9f4965608354599669f7
Signed-off-by: Sandro Bonazzola <sbonazzo@redhat.com>