removed (already disabled) transformation tests from StreamGmlWriterTest

Change-Id: I8d06c3db18828fed42d3a7725f8fc59471a04c67
Reviewed-on: http://gerrit.esdi-community.eu/3214
Tested-by: Jenkins <sitemple@igd.fraunhofer.de>
Reviewed-by: Simon Templer <simon.templer@igd.fraunhofer.de>