Introduce new implementation of the EMEC geometry based on standard Geant4 shapes
This MR introduces a new implementation of the EMEC geometry based on standard Geant4 shapes, i.e. G4GenericTrap, by Evgueni Tcherniaev. The code comes with a new GeoModel flag EMECStandard
that can be used to activate the new description. By defaut the flag is false, so the EMEC is constructed as usual with the custom solid. In order to activate the new description one would need to use the following preExec: --preExec "flags.GeoModel.EMECStandard=True;"
Edited by Marilena Bandieramonte