015 - entity isolation filter

[k-wall]

Proposes the introduction of a "Entity Isolation Filter" to Kroxylicious's core filters.

This filter gives each authenticated user a private space within a Kafka cluster, isolated from other users sharing the same cluster. Isolation can be applied selectively to some entity types and not others.
For example, it's possible to have isolation for consumer groups, but not for topics.

[k-wall]

I said on the sync call, I'll iterate on the APIs in a PR then update the proposal.

[tombentley]

@k-wall assuming #75 doesn't get merged first, I suppose you will need to renumber the filename.

[tombentley]

@k-wall what's the status on this. We merged the isolation filter already, so I guess this should be merged too?

[k-wall]

Thanks, this did slip from my radar. I'll fix this up to reflect what was done.

[k-wall]

@robobario and @tombentley low priority for re-review.

[SamBarker]

LGTM thanks @k-wall

[tombentley]

Thanks @k-wall