The PBS job manager module ("sub poll" in pbs.pm) expects exit code 153
(Unknown job id) from PBS to detect when a job has finished.

However, this exit code is not returned in all cases. If job history is enabled
on the PBS server using the following command:

set server job_history_enable = True

PBS will no longer report exit code 153 but instead 35 for finished jobs. Thus,
the job manager ignores this status and never detects that the job has
finished.

Tested with PBS Pro 10.1.0.91350 and GT 4.0.8.