Job script epilogue

[ernimd]

Would be nice to have job_script_prologue equivalent but for cleanup. I.e. run some commands after worker exists. The argument could be called job_script_epilogue.

[guillaumeeb]

Hi @ernimd,

Sure, I can imagine this can be useful in some case, I'm almost surprised the need didn't occur before. I think it should be simple enough, considering the prologue part is already implemented.

Would you want to submi a PR for this?