Adding Two way video and audio streaming test to RtcBot

NOTE: This code review based on this running issue:
https://review.webrtc.org/24939004/

R=andresp@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/25879004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7498 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/tools/rtcbot/test/webrtc_video_streaming.js

@@ -20,7 +20,7 @@ function testOneWayVideo(test, bot1, bot2) {
     onPeerConnectionCreated);
 
   function createPeerConnection(done) {
-    test.createTurnConfig(onTrunConfig.bind(this), test.fail);
+    test.createTurnConfig(onTurnConfig.bind(this), test.fail);
 
     function onTurnConfig(config) {
       this.createPeerConnection(config, done, test.fail);