packaging: setup: check service status by rc

Before this change, the status of services was checked by searching for
keywords in the output of 'service $service status'. This didn't work
well on locales where the output did not contain the expected keywords.
With this change we only check the return code of that command.

Bug-Url: https://bugzilla.redhat.com/1067673
Change-Id: I306dfb6cf069c26a59e1d9a0d4678a1888300784
Signed-off-by: Yedidyah Bar David <didi@redhat.com>