transformation CLI: provide GroovyService to transformation environment

Change-Id: I67096aa4962ce7b0942a61da2ab875f2250dbfa0
Reviewed-on: http://gerrit.esdi-community.eu/3200
Reviewed-by: Simon Templer <simon.templer@igd.fraunhofer.de>
Tested-by: Simon Templer <simon.templer@igd.fraunhofer.de>