Added photon Russian Roulette

manual sweep of !22077 (merged). Small conflict in AthenaStackingActionTool.cxx

This merge request affects 3 packages:

• Simulation/G4Atlas/G4AtlasAlg
• Simulation/G4Atlas/G4AtlasApps
• Simulation/SimulationJobOptions

Adding @jchapman ,@vpascuzz as watchers

added Simulation master review-pending-level-1 labels

CI Result SUCCESS

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-22570-2019-04-11-01-37
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST 36869]

The changes look fine to me and there are no CI issues. Approving.

Jason (L1 shifter)

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit 4da949df

added sweep:ignore label

mentioned in merge request !22077 (merged)