WIP Piper node mode

This doesn't handle sample-level job tracking yet w.r.t the database and also I need to add a Charon update into the sbatch file before checking the coverage to see if we can proceed with sample analysis, but the rest of it seems to work. I'm aware that parts of it are a little hacky (#fix later) but I'm open to suggestions for improvements as well.
I found this over-complex, give a look to this
https://github.com/SciLifeLab/de_novo_scilife/blob/master/sciLifeLab_utils/run_QC_analysis.py
can you have a more static solution like the one that I implemented. It is important to be general but this peace here looks really too complex