packaging: upgrade-check branding support

Added branding support to ovirt-engine-upgrade-check

Change-Id: I9e44cad12a27106c94610d9084b89e6bf1b8dae5
Bug-Url: https://bugzilla.redhat.com/1078955
Signed-off-by: Sandro Bonazzola <sbonazzo@redhat.com>