Changed type of object and insert a small change.

Changed uses of OGroup and OInstance to Group and Instance.
Deleted an inserted seperator at the end of the headline. (csv write)

Change-Id: Iffb58a09a7965092ca04b88d988ee054e3eacae5
Reviewed-on: http://gerrit.esdi-community.eu/3108
Tested-by: Jenkins <sitemple@igd.fraunhofer.de>
Reviewed-by: Simon Templer <simon.templer@igd.fraunhofer.de>