Return code 3 for status action if stopped

Was having trouble getting an automation tool to start djatoka using the init script. It expects a non-0 return code from the `status` action if djatoka is not running.

This change returns rc 3 if djatoka is not running, following [LSB Core Spec 3.1](http://refspecs.linuxbase.org/LSB_3.1.0/LSB-Core-generic/LSB-Core-generic/iniscrptact.html)