OpenApi Spec for response properties that are objects has an empty 'default'

Chris Simon

When a table has an property with an object type, the OpenApi spec includes `default: {}` for that property in the response schema.  This prevents swagger and other OpenApi generators from including the correct schema in their default example jsons.

Removing that `default: {}` would allow swagger to show the correct response payload.

Michael Udinski

We'll see about adding this feature - definitely would be helpful