Readcounts + connectionpool

Readcounts : an EPP that will be used to sum up reads

connectionpool : since tools has 24 potential threads, I can't work with the default connectionpool size (10) if I want to run a lot of threads.
I just got curious as you used "sample.name" before and "s.name" in this loop. But as long as this was intentional I think it fine. Just let me know if you want to rename it or I can merge this right away :+1: