Print failed response body in integration tests

Signed-off-by: Lann Martin <[email protected]>

tests/integration.rs

@@ -639,7 +639,11 @@ mod integration_tests {
  expected: u16,
  ) -> Result<()> {
  let res = req(s, absolute_uri).await?;
- assert_eq!(res.status(), expected);
+ let status = res.status();
+ let body = hyper::body::to_bytes(res.into_body())
+ .await
+ .expect("read body");
+ assert_eq!(status, expected, "{}", String::from_utf8_lossy(&body));
 
  Ok(())
  }