Add mass/weight to MovingObject #824

Describe the feature

We are using the OSI Traffic Participant for our simulation models. The traffic participant also includes the dynamics model. We'd like to add a dynamics model for handling collisions. For a basic model, we would need the information about the mass of all participants involved in a collision. As the mass is currently only available as curb_weight in HostVehicleData (via VehicleBasics), this information is currently not available to a traffic participant.

Describe the solution you would like

Add a field for the mass/weight to MovingObject to make this information available via GroundTruth/SensorView, and thus via the traffic participant interface.

Describe alternatives you have considered

Modeling the collision behavior outside of the traffic participant (in the simulation environment, where there might be potential access to all HostVehicleDatas) would be a lot more effort from implementation point of view. This is not feasible in comparison to the rather small addition suggested here.

Describe the backwards compatibility

Just adding the mass to the MovingObject wouldn't directly introduce any backwards compatibility issues. But we might have to think about how to handle the currently existing curb_weight. Keeping it would mean introducing redundancy. Removing it breaks backward compatibility. Changing the current definition (like having something like the actual weight in the HostVehicleData) would break compatibility as well. I'd assume the field is not that widely used at the moment, so I don't consider this a show stopper. Other users might have a different view on this.