update travelTime and cost of current stage

[rummel123]

traci.person.getStage(person_id, 0).length gives the current length of the already travelled way of the current stage.
traci.person.getStage(person_id, 0).travelTime and traci.person.getStage(person_id, 0).cost gives the default value -1073741824.0, due to the stage is not yet finished and will be calculated only when the stage is finished. It would be nice to update these values just as well the length to get the current travel time and current cost of the current stage.

[rummel123]

I need this extension for the drtOrtools.py. Can I help somehow? In which file is it calculated?

[namdre]

libsumo/Person.cpp in getStage.
the traveltime can be computed from the depart time (time of entering the vehicle)
cost is usually identical to traveltime (except when using a very special router but that isn't applied to taxi routing.

[rummel123]

I added the current travel time of the already traveled way of the current stage.
I don't how to add a test for that. I tested with my scenarios and it seems to work.

[rummel123]

I found and adapted a suitable test