anchor.diff:  
   A response code of `200 OK` with a body of `{}` indicates that the resource was
   deleted.
  -A response code of `410 Not Found `with a body of `{}` indicates to Cloud
  +A response code of `410 Gone` with a body of `{}` indicates to Cloud
   Controller that the resource was not there in the first place, and is likely
   gone.
   _Any other_ response code indicates to Cloud Controller that the the service
  
positive.code: will periodically retry that DELETE request until it succeeds (or generates a
  410).
  Eventually it will give up, but this technique will help clean up resources
  that are remain when a broker fails to delete.
negative.code: 
  A response code of `200 OK` with a body of `{}` indicates that the resource was
  deleted.
  A response code of `410 Gone` with a body of `{}` indicates to Cloud
  Controller that the resource was not there in the first place, and is likely
  gone.
  _Any other_ response code indicates to Cloud Controller that the the binding
  