add validator catchup to multi-node test

tests/multinode.rs

@@ -129,15 +129,32 @@ fn test_multi_node() {
     //verify validator has the same balance
     let mut success = 0usize;
     for server in servers.iter() {
+        info!("0server: {:?}", server);
         let mut client = mk_client(server);
         if let Ok(bal) = client.poll_get_balance(&bob_pubkey) {
-            trace!("validator balance {}", bal);
+            info!("validator balance {}", bal);
             if bal == leader_balance {
                 success += 1;
             }
         }
     }
     assert_eq!(success, servers.len());
+
+    // start up another validator, converge and then check everyone's balances
+    validator(&leader.data, exit.clone(), &alice, &mut threads);
+    let servers = converge(&leader.data, exit.clone(), N + 3, &mut threads);
+    for server in servers.iter() {
+        let mut client = mk_client(server);
+        info!("1server: {:?}", server);
+        if let Ok(bal) = client.poll_get_balance(&bob_pubkey) {
+            info!("validator balance {}", bal);
+            if bal == leader_balance {
+                success += 1;
+            }
+        }
+    }
+    assert_eq!(success, servers.len());
+
     exit.store(true, Ordering::Relaxed);
     for t in threads {
         t.join().unwrap();