Include version in service template metadata

When the tosca template is generated for a service the version number for the service shall be included in the metadata. The key in the metadata shall be "template_version" (as per https://docs.oasis-open.org/tosca/TOSCA-Simple-Profile-YAML/v1.3/os/TOSCA-Simple-Profile-YAML-v1.3-os.html#_Toc26969451 chapter 3.10.1.1)

Include version in VFC metadata

When the tosca is generated for a VFC the version number for the VFC shall be included in the metadata. The key in the metadata shall be "version" (as per https://docs.oasis-open.org/tosca/TOSCA-Simple-Profile-YAML/v1.3/os/TOSCA-Simple-Profile-YAML-v1.3-os.html#_Toc26969448 chapter 3.7.1.1)