mappings/VegCore-VegBIEN.csv: Don't combine taxonRank with infraspecificEpithet if there is no infraspecificEpithet, because the taxonRank is only the infraspecificEpithet's prefix when there is an actual infraspecificEpithet. Often, taxonRank contains values like "genus" or "species" which cannot be used for this purpose.
mappings/VegCore-VegBIEN.csv: Don't combine taxonRank with infraspecificEpithet if there is no infraspecificEpithet, because the taxonRank is only the infraspecificEpithet's prefix when there is an actual infraspecificEpithet. Often, taxonRank contains values like "genus" or "species" which cannot be used for this purpose.