title: Connection error in websocket over amazon ELB
body: <p>My service resides in a server which has amazon ELB. The client portion communicates with the 
  server by vertx eventbus. While trying to connect the server following logs pops out</p>
  
  <pre><code>WebSocket connection to 'wss://login.com:7070/Notify/287/mxyox3qd/websocket' failed: Error during WebSocket handshake: Unexpected response code: 400
  </code></pre>
  
  <p>My Code at the client side:</p>
  
  <pre><code>  eventBus = new EventBus(url);
          eventBus.onopen = function() {
                    // ---------- Do Something ---------------------------------
              });
  
          }
  </code></pre>
  
  <p>Does ELB listener have something to do with this? can someone help ? </p>