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### Checklist

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- [ ] Conversion: I have checked my source definition is valid OpenAPI 2.0
- [ ] Validation: I believe my source definition is valid OpenAPI 3.0.x but the validator complains
- [ ] Validation: I believe my source definition is invalid OpenAPI 3.0.x but the validator does not complain

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For validating OpenAPI 2.0 definitions, we recommend the [bigstickcarpet swagger validator](http://bigstickcarpet.com/swagger-parser/www/index.html)
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### Detailed Description
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#### Other stuff

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