Stop using CallAllUnordered in peer_set::add_initial_peers (#1705)

* use ServiceExt::oneshot and FuturesUnordered

Co-authored-by: teor <teor@riseup.net>

zebra-network/src/peer_set/initialize.rs

@@ -194,9 +194,10 @@ where
     S::Future: Send + 'static,
 {
     info!(?initial_peers, "Connecting to initial peer set");
-    use tower::util::CallAllUnordered;
-    let addr_stream = futures::stream::iter(initial_peers.into_iter());
-    let mut handshakes = CallAllUnordered::new(connector, addr_stream);
+    let mut handshakes = initial_peers
+        .iter()
+        .map(|request| connector.clone().oneshot(*request))
+        .collect::<futures::stream::FuturesUnordered<_>>();
 
     while let Some(handshake_result) = handshakes.next().await {
         tx.send(handshake_result).await?;