packaging: setup: don't ask if the engine is complete when setting the 2nd host

Wait for engine installation only on the first host.

Change-Id: Ie31259341d29627ecd585e5fc0a14a2698041348
Bug-Url: https://bugzilla.redhat.com/1106561
Signed-off-by: Simone Tiraboschi <stirabos@redhat.com>
(cherry picked from commit f3f86eec50b7bb1e556ab6b5a94ad88a5ecd9e2a)