G4 passback working in ISF MT
Added a mechanism for returning secondaries to SimKernelMT, rather than going through particle broker.
Currently returns identical results to the non-MT version, if you modify non-MT with the following postExec command:
--postExec "svcMgr.ISF_ParticleBrokerSvcNoOrdering.ParticleOrderingTool='ISF__EnergyParticleOrderingTool';svcMgr.ISF_ParticleBrokerSvcNoOrdering.AlwaysUseGeoIDSvc=True"
This command orders the particle queue in a predictable way.
Edited by Benjamin Michael Wynne