pSConfig cannot properly calculate checksums when pScheduler limit rewriter modifies task

[arlake228]

If you have a limit rewrite in place that adds a field, then pscheduler cannot properly compare a task since the final set of parameters differs from what pSConfig gave pscheduler. This can cause to constant task recreation.

A potential fix for this is to have pSConfig include its calculated checksum in the reference field and use that for comparison. This would probably make the comparison code simpler as well.