code: function updateApplication(uuid, opts, callback) {
      assert.string(uuid, 'uuid');
      assert.object(opts, 'opts');
  
      return (this.put(sprintf('/applications/%s', uuid), opts, callback));
  }
docs: Updates an application
  
  @param {String} uuid: the UUID of the applications.
  @param {String} opts: new attributes
  @param {Function} callback: of the form f(err, app).