Service to manage prediction models.

The only current supported operation is to request to run a given prediction model.

Requests to the PredictionModelService are executed in the context of the customer's service account (SA). The SA is a special user that is a member of the customer user group, giving it access to all folders that are shared with this user group, but not to private folders. Hence, only prediction models that are in folders shared to the SA, via the customer user group, will be accessible via the PredictionModelService.