Similar to the problem that is fixed in PR#5 (pending merge as of this writing), the package_version variable should be exposed (and passed through to the underlying "artifactory" module so that the version of the package can be set without having to know the underlying implementation. If defaulted to 'undef', this would preserve existing behavior, and then I wouldn't have to have a single hiera key for 'artifactory' when everything else is for 'artifactory_pro' ...