fix(browser): reply "start" event

When a browser creates another socket.io connection, we forget the old one, however we need to reply all the events that happens in that connection. Somehow I forgot to reply "start" event, which caused the "Adapter did not report number of tests" warning.

lib/server.js

@@ -85,7 +85,7 @@ var start = function(injector, config, launcher, globalEmitter, preprocess, file
   socketServer.sockets.on('connection', function (socket) {
     log.debug('A browser has connected on socket ' + socket.id);
 
-    var replySocketEvents = events.bufferEvents(socket, ['info', 'error', 'result', 'complete']);
+    var replySocketEvents = events.bufferEvents(socket, ['start', 'info', 'error', 'result', 'complete']);
 
     socket.on('register', function(info) {
       var newBrowser;