If a station can't be found, getTrains gives a 500 exception

[basdado]

If a station has coordinates, but the train map does not have a any nodes near these coordinates, the following exception is thrown:

java.lang.IllegalStateException: Could not find railway nodes near to coordinate [51.5385828,7.6953056]

See the attached stacktrace log

This causes a 500 response to the client, causing no trains to display (even though the problem is with just one station

trainfinder_unknown_station_stacktrace.zip
...)