Changes to Stream batch items (Phase 2)

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

removed the optional property message from the response with the 401 status

removed the optional property message from the response with the 415 status

removed the optional property message from the response with the 422 status

removed the optional property message from the response with the 500 status

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

added the optional property error to the response with the 401 status

added the optional property error to the response with the 415 status

added the optional property error to the response with the 422 status

added the optional property error to the response with the 500 status

endpoint added