Change tests to represent behaviour documented in code.

See https://github.com/opentripplanner/OpenTripPlanner/blob/19af62dd0a8621384c00c1004a784d979c251116/src/main/java/org/opentripplanner/routing/edgetype/TripPattern.java#L201
Fix error in previous commit
Merge pull request #1601 from hannesj/fix_#1567

Change tests to represent behaviour documented in code.