Changes to Fetch offer details

removed the optional property message from the response with the 400 status

api operation id get-an-offer removed and replaced with fetch-offer-details

added the new optional query request parameter customerIP

added the non-success response with the status 422

removed the non-success response with the status 401

removed the non-success response with the status 404

added the optional property errors to the response with the 400 status