Order Jobs configured with <process> or <script type="shell"> don't set error_state

If a <process> Job is a state in a job chain, with next_state and error_state, orders passing this state will always be moved to the next_state.
Even if the process exits with exit_code!=0, the order goes to the next_state.
(A warning is logged for the non-zero exit_code, but only after the order has been set to the next_state)