applications: luci-cshark: set status on failure

Signed-off-by: Petar Koretic <petar.koretic@sartura.hr>
applications: luci-cshark: remove unneeded whitespace

Signed-off-by: Petar Koretic <petar.koretic@sartura.hr>
applications: luci-cshark: add stricter checking

Signed-off-by: Petar Koretic <petar.koretic@sartura.hr>