Congestion not computed anymore #288
Description
The congestion update does nothing currently, so travel costs stay free flow costs even if the user enables congestion for CarMode and sets n_iter_per_cost_update to more than zeo.
The bug was introduced here when working on the flows contamination issue between runs that we had at the moment.
The problem was that I used the old way of accessing the congestion parameter: getattr(m, "congestion", False) instead of m.inputs["parameters"].congestion.
I have a fix locally, and a test to avoid regressions on congestion calculations such as this one in the future.