GeoJSONConfigType: don't store redundant information

Change-Id: Ibe573d6f44bc699fefc016a313f544bad0e464c2
Reviewed-on: http://gerrit.esdi-community.eu/3130
Tested-by: Jenkins <sitemple@igd.fraunhofer.de>
Reviewed-by: Simon Templer <simon.templer@igd.fraunhofer.de>