First implementation of the Neutron Russian Roulette algorithm in the Athena...

First implementation of the Neutron Russian Roulette algorithm in the Athena Stacking Action (ATLASSIM-3924)

- weighted energy deposit in LArG4Barrel

- weighted energy deposit in LArG4EC

- weighted energy deposit in LArG4FCAL

- weighted energy deposit in LArG4H6SD

- weighted energy deposit in LArG4MiniFCAL

- weighted energy deposit in TileAncillary

- weighted energy deposit in TileGeoG4SD

- weighted energy deposit in LArG4HEC