packaging: updated setup to fail immediately if adding host fails

* Updated retry() function in utils to recieve an Exception
that will not be ignored.
* Updated host status check with the additional Exception that
if raised will fail the setup.

Change-Id: I404af2b1702dbe5881cbd60d06a1b976b7a651a7
Signed-off-by: Alex Lourie <alourie@redhat.com>