Fix expected service RC (#73)
Fix expected service RC (#73)

OpenAS2 server returns RC 143 on successful shutdown and systemd should expect so.
OpenAS2/OpenAs2App,igwtech/OpenAs2App,OpenAS2/OpenAs2App,igwtech/OpenAs2App,OpenAS2/OpenAs2App,igwtech/OpenAs2App,igwtech/OpenAs2App,OpenAS2/OpenAs2App