message: cincinnati: fix clippy warnings
diff: @@ -127,7 +127,7 @@ impl Client {
  let result = future::result(req)
  .and_then(|req| req.send().from_err())
  .map_err(move |e| CincinnatiError::FailedRequest(e.to_string()))
  - .and_then(|resp| Self::map_response(resp));
  + .and_then(Self::map_response);
  Box::new(result)
  }
  