Vars file handling centralized
We have the same coding for handling varsf-files and vars. With that change we shift to having one common coding for that
Provide cloudFoundryDeploy step in GO layer.
Groovy part untouched. Groovy-Stub needs to be provided later (with a feature toggle in order to be able to switch back)
Co-authored-by: Stephan Aßmus <stephan.assmus@sap.com>
