Publish open-ml datasets

[Branko-Dj]

As a datahub We have 200 open-ml datasets that we wish to publish under the user machine-learning

Acceptance criteria

• [x] On a machine-learning user page there should be additonal 100 datasets from open-ml

Tasks

• [x] By using repo dataset-operations initialize and validate datapackages.
• [x] Publish datasets with new datapackages

[Branko-Dj]

FIXED! Open-ml datasets can be found under our machine-learning user https://datahub.io/machine-learning