Implementation of jXE Multiplicity
Changes implemented:
- XEMultiplicity class name and file changed to EnergyThreshold, to bring in line with menu.
- Enable EnergyThreshold items in TopoSteering, and filtering for gFEX items that are not yet implemented.
- Changing Types.cxx to return the correct mapping for jXE input and the MET class
- Changing EnergyInputProviderFEX to fill EtDouble.
- Enable EnergyInputFEX in TopoSimulationConfig.
- Update the Trigger Test counts to reflect enabled jXE thresholds