Implement object interface in the swagger spec.

[brendandburns]

Context:
kubernetes-client/java#101

See: https://apihandyman.io/writing-openapi-swagger-specification-tutorial-part-4-advanced-data-modeling/#create-a-hierarchy-between-definitions-to-implement-inheritance-highly-experimentatl

for details.

[fejta-bot]

Issues go stale after 90d of inactivity.
Mark the issue as fresh with /remove-lifecycle stale.
Stale issues rot after an additional 30d of inactivity and eventually close.

Prevent issues from auto-closing with an /lifecycle frozen comment.

If this issue is safe to close now please do so with /close.

Send feedback to sig-testing, kubernetes/test-infra and/or @fejta.
/lifecycle stale

[fejta-bot]

Stale issues rot after 30d of inactivity.
Mark the issue as fresh with /remove-lifecycle rotten.
Rotten issues close after an additional 30d of inactivity.

If this issue is safe to close now please do so with /close.

Send feedback to sig-testing, kubernetes/test-infra and/or fejta.
/lifecycle rotten
/remove-lifecycle stale

[fejta-bot]

Rotten issues close after 30d of inactivity.
Reopen the issue with /reopen.
Mark the issue as fresh with /remove-lifecycle rotten.

Send feedback to sig-testing, kubernetes/test-infra and/or fejta.
/close

[davidxia]

@brendandburns hey, just wondering if there's been any progress on this. I'd love to help if no one's currently working on it. Just gotta know where to start.