add handling for a special case in driver strategy: vehicle declerates to new...

add handling for a special case in driver strategy: vehicle declerates to new target speed, shift strategy decides to downshift, toruqe at gearbox output is negative (due to slope and other resistances), but torque at gearbox input gets slightly positive but the gearbox is disengaged - no driving force. trying again with roll action after overload fro brake action.

VectoCore/VectoCore/Models/SimulationComponent/Impl/DefaultDriverStrategy.cs

@@ -658,7 +658,12 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 					DataBus.BrakePower = 0.SI<Watt>();
 					response = Driver.DrivingActionBrake(absTime, ds, DriverStrategy.BrakeTrigger.NextTargetSpeed,
 						gradient, targetDistance: targetDistance);
-				});
+						response.Switch().Case<ResponseOverload>(
+							() => {
+								Log.Info("Brake -> Geearshift -> Overload -> trying roll action (no gear engaged)");
+								response = Driver.DrivingActionRoll(absTime, ds, DriverStrategy.BrakeTrigger.NextTargetSpeed, gradient);
+							});
+					});
 			return response;
 		}