dead cells
It produces and stores three jet moment : BchCorrCell, BchCorrDotx, BchCorrJet after computing the energy fraction of dead cells.
IMPORTANT : this run2 implementation is less complete than before. -> it can not make use of the older IHadronicCalibrationTool (wasn't used by default anyway) and therefore doesn't take the cryostat correction into account.
Also it now requires the existence of a MissingCaloCellsMap in SG.
Lots of commented blocks are still around until we're sure they're not needed anymore.