packaging: setup: Always regenerate jasper conf

Without this change, the following flow fails:
* setup
* backup
* cleanup
* restore
* setup

Also add param 'noSuffix' to _buildJs to allow calling
gen-config without suffix (ce or pro).

Required-By: http://gerrit.ovirt.org/25850
Related-To: https://bugzilla.redhat.com/1068979
Change-Id: I810cfae4e8ee4901e46fa49b46c7a8a41dde0bf1
Signed-off-by: Yedidyah Bar David <didi@redhat.com>