The OAI spec does not pass validation (BBCC-1152)

The OAI spec at https://api.bitbucket.org/swagger.json does not pass validation.

To reproduce:

swagger-codegen validate -i https://api.bitbucket.org/swagger.json\or

openapi-generator validate https://api.bitbucket.org/swagger.json\These errors seem to be causing code generation to fail, even when passing --skip-validate-spec.