My intent for `only-when-katello` was not this.  I meant for `only-when-katello` to go in katello.rest and be generic

```clj
(defn only-when-katello [f]
 (fn [& args] (when (rest/is-katello?) (apply f args)))

...
(extend katello.Environment
 ui/CRUD {:create (only-when-katello create) 
...
}
```