added parameter descriptors for CSVInstanceWriter

Change-Id: Ie5e43b7578ffaf3f16335587bfffa09d64f7e7cc
Reviewed-on: http://gerrit.esdi-community.eu/3191
Reviewed-by: Simon Templer <simon.templer@igd.fraunhofer.de>
Tested-by: Simon Templer <simon.templer@igd.fraunhofer.de>