Advanced Roundabouts
Advanced Roundabouts

These kind of roundabouts came up during Lane Handling for roundabouts.
They're called Turbo-roundabouts or Turbine-roundabouts and are very
popular e.g. in Germany and the UK.

Seems like our roundabout handler sometimes is getting confused.

Trying to figure out why, and codifying some scenarios for cucumber.

References:
- https://github.com/Project-OSRM/osrm-backend/pull/2693

felixguendling/osrm-backend,hydrays/osrm-backend,raymond0/osrm-backend,raymond0/osrm-backend,duizendnegen/osrm-backend,hydrays/osrm-backend,oxidase/osrm-backend,duizendnegen/osrm-backend,deniskoronchik/osrm-backend,neilbu/osrm-backend,deniskoronchik/osrm-backend,bjtaylor1/osrm-backend,frodrigo/osrm-backend,Project-OSRM/osrm-backend,raymond0/osrm-backend,oxidase/osrm-backend,neilbu/osrm-backend,Project-OSRM/osrm-backend,hydrays/osrm-backend,KnockSoftware/osrm-backend,yuryleb/osrm-backend,bjtaylor1/osrm-backend,Project-OSRM/osrm-backend,deniskoronchik/osrm-backend,neilbu/osrm-backend,oxidase/osrm-backend,duizendnegen/osrm-backend,raymond0/osrm-backend,neilbu/osrm-backend,deniskoronchik/osrm-backend,yuryleb/osrm-backend,felixguendling/osrm-backend,KnockSoftware/osrm-backend,hydrays/osrm-backend,frodrigo/osrm-backend,KnockSoftware/osrm-backend,duizendnegen/osrm-backend,frodrigo/osrm-backend,oxidase/osrm-backend,bjtaylor1/osrm-backend,yuryleb/osrm-backend,yuryleb/osrm-backend,Project-OSRM/osrm-backend,frodrigo/osrm-backend,bjtaylor1/osrm-backend,felixguendling/osrm-backend,KnockSoftware/osrm-backend