Missing urls and auth when trying to process lp-etl

[sorki]

I'm trying mvn2nix with https://github.com/linkedpipes/etl but it doesn't seem to be processed correctly - I'm running this in the toplevel directory where pom.xml seems to include bunch of subprojects. Exploring the generated json I've found that e.g. vocabulary subpackage is missing an url. Also authenticated fields seems to be missing. I've found that there is a multiproject support, also tried workaround from #5.