Model versioning

With the new UI, all changes even micro changes are incurring multiple versions, this is good and bad as we have a full roll back on any change to a very granular point.
The proposed idea, is to have a separate version system for tracking changes in Menas (when creating and updating definition) compared to version of the dataset we run when doing spark-submit, we will have too many versions due to micro-changes that Menas is going to introduce