Migrate ISF_Geant4Tools/TransportTool to use the thread-safe random number service

John Derek Chapmanrequested to merge
jchapman/athena:TransportTool_AthRNGSvc_master into master

This merge request updates TransportTool to use IAthRNGSvc rather than IAtRndmGenSvc. The Mersenne Twister is still used by default, but the syntax now matches what is used in G4AtlasAlg.

The way the random number engine is re-seeded changes slightly, so the simulation out will change.

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