packaging: setup: iSCSI support

Add support for iSCSI storage domains.
The feature is described on the oVirt wiki
http://www.ovirt.org/Features/Self_Hosted_Engine_iSCSI_Support

Bug-Url: https://bugzilla.redhat.com/1080402
Change-Id: Ide79a130b730d95d3545dcfb80b1b01dfeaf2b12
Signed-off-by: Sandro Bonazzola <sbonazzo@redhat.com>
Signed-off-by: Jiri Moskovcak <moskovcak@gmail.com>