BrowseOrientInstanceCollection: special treatment for MetaFilters

Change-Id: Idf8968a461665bc192bc9c4813fec8deb330b45d
Reviewed-on: http://gerrit.esdi-community.eu/3147
Tested-by: Jenkins <sitemple@igd.fraunhofer.de>
Reviewed-by: Simon Templer <simon.templer@igd.fraunhofer.de>