fix: write hdv group for completed bus specific into sum file

VectoCore/VectoCore/Models/Declaration/CompletedBusSegments.cs

@@ -139,6 +139,7 @@ namespace TUGraz.VectoCore.Models.Declaration
 						TotalCargoVolume = 0.SI<CubicMeter>(),
 						DefaultCDxA = row.ParseDouble("cdxastandard").SI<SquareMeter>(),						
 						BusParameter = new BusParameters {
+							BusGroup = VehicleClassHelper.Parse(row.Field<string>("hdvgroup")),
 							PassengerDensity = row.ParseDouble(missionType.ToString()).SI<PerSquareMeter>(),
 							AirDragMeasurementAllowed = row.ParseBoolean("airdragmeasurement"),
 							ElectricalConsumers = GetVehicleEquipment(row),