test: fix test/simple/test-net-server-max-connections.js is racey

Fixes #1333.

test/simple/test-net-server-max-connections.js

@@ -42,9 +42,7 @@ var server = net.createServer(function(connection) {
 });
 
 server.listen(common.PORT, function() {
-  for (var i = 0; i < N; i++) {
-    makeConnection(i);
-  }
+  makeConnection(0);
 });
 
 server.maxConnections = N / 2;
@@ -53,10 +51,15 @@ console.error('server.maxConnections = %d', server.maxConnections);
 
 
 function makeConnection(index) {
-  setTimeout(function() {
   var c = net.createConnection(common.PORT);
   var gotData = false;
 
+  c.on('connect', function() {
+    if (index + 1 < N) {
+      makeConnection(index + 1);
+    }
+  });
+
   c.on('end', function() { c.end(); });
 
   c.on('data', function(b) {
@@ -96,7 +99,6 @@ function makeConnection(index) {
                    index + ' got data, but shouldn\'t have');
     }
   });
-  }, index);
 }