The scheduler monitors running jobs to make sure they are not hung. If
the status of a running job does not change after a duration (the
interruptThreshold in the scheduler), the scheduler kills the job. This
change passes the scheduler's interruptThreshold to the job when it
calls Run() on the job.
This function was returning the set of deletion tables. A view seems
better suited for this task since it would allow for applying additional
filters of the result set. This was particularly necessary to easily
make changes to some sqltests due to switching the delete trigger for
the session table.
(cherry picked from commit 32d41639892950b21fafc39b50c10b997c6d5121)