Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
Remove trailing commas from test-swagger.json
Trailing commas are not allowed in JSON. Commas are only allowed between values. See http://www.json.org/
**What this PR does / why we need it**:
Fixes invalid JSON in test-swagger.json
**Release note**:
```release-note
NONE
```