Return error status if Swagger response validation fails

[georgiana-b]

Currently, the status is set in the controller but after that Swagger tries to validate the response against the response schema. If the status was 2** it remains that way even if the validation fails and the response actually contains error messages.

Normally these response validation errors shouldn't happen in production but since the assumptions we made about the data are not always right, there are cases when it happens and it ruins the frontend flow.

We should respond with 500 and log the errors.