1. make public the hops artefacts download url. There is currently no way for me to change to hops artefacts installed (to my own), without setting up all the artefacts for hopsworks and related, and then changing the download_url. The person wanting to change the hops artefacts might not even be aware of all the artefacts downloaded from the download_url location by other services. Make public = add in the metadata.rb file.
2. remove hops url secondary - unusued ()
With the fix, all hops artefacts should be downloaded from the configurable attribute:
If not set, the attribute defaults to