RouteGenerator: simplify findOneWayRoutes
RouteGenerator: simplify findOneWayRoutes

If we're already validating against the list of goods that we passed
in, then there's no reason to loop over all possible goods. Just loop
over the goods that were passed in.

hemberger/smr,hemberger/smr,smrealms/smr,smrealms/smr,hemberger/smr,hemberger/smr,smrealms/smr