cfr-ml-models existence does not seem to be working properly in stage

[crankycoder]

Bug 1601303 indicates that the collections have already been created on stage and prod.

https://settings.stage.mozaws.net/v1/buckets/monitor/collections/changes/records indicates that cfr-ml-experiments, cfr-ml-models and cfr-ml-control are created.

This looks like a minor typo for cfr-ml-model vs cfr-ml-models

https://github.com/mozilla/messaging-system-personalization-experiment-1-numbermuncher/blob/master/cfretl/settings.py#L43

[crankycoder]

This seems like a DataOps bug : https://bugzilla.mozilla.org/show_bug.cgi?id=1606719

[crankycoder]

This was a couple bugs.

• The RemoteSettings permissions repo (https://github.com/mozilla-services/remote-settings-permissions/) requires that both the stage and production YAML files need to be applied to the stage deployments.
• Authentication is required for every API call to the RemoteSettings stage server. The authentication requirement was not as strict in the dev instance where auth is only required for create/update requests, but not for read requests which check for existence of a collection. Auth everywhere added in d6471a1ecf19d4bb90a0f38dea8186fdddc513f8