Found this quite ancient TODO in GeoDistanceQueryBuilderTests#assertGeoDistanceRangeQuery that
we probably want to add a few checks to the GeoDistanceQueryBuilder that are being parsed in the
test. So far the only thing the test checks is that the parsing of the input Json Strings doesn't break.
It would be nice to add some way to do meaningfull assertions on the generated GeoDistanceQueryBuilder
instances and maybe even to the Lucene Queries generated later (although that is a bit harder).