prepost.simchunks: cases with [hs2] tag activated are grouped in chunks
if the [hs2] tag is used, group all those cases into their own chunks, and avoid them being mixed up with HAWC2 simulations that probably will take much longer the simulate.
if the [hs2] tag is used, group all those cases into their own chunks, and avoid them being mixed up with HAWC2 simulations that probably will take much longer the simulate.