transformation CLI: support validation of result

Change-Id: I894c973953a85b65acb9a8331f2611b52297f95c
Reviewed-on: http://gerrit.esdi-community.eu/3195
Tested-by: Jenkins <sitemple@igd.fraunhofer.de>
Reviewed-by: Simon Templer <simon.templer@igd.fraunhofer.de>