packaging: setup: Do not check jasper home existance

as it might not exist - we want to allow:

$ yum install ovirt-engine ovirt-engine-reports-setup
$ engine-setup

and have jasperreports installed by setup.

Keep the check for developer mode.

Change-Id: I03c17c01c4d8bad7dadfda21ea60eb6d671637df
Bug-Url: https://bugzilla.redhat.com/1093360
Signed-off-by: Yedidyah Bar David <didi@redhat.com>