make tests more robust to data changes

[jhnwllr]

Some tests as they are currently written are very sensitive to changes in GBIF data (which happens a lot).

[MattBlissett]

Where we use live data for tests in the Java webservices we generally use the Pontaurus dataset, as we know it to be static and it's Markus' PhD data: https://www.gbif.org/dataset/8575f23e-f762-11e1-a439-00145eb45e9a