Add version number 3.5.

Change-Id: I7feea65be556cd850d0ffc7e83427efa3bdfc255
Reviewed-on: https://git-ccr-1.devtools.intel.com/gerrit/60218
Tested-by: webrtctest <webrtctest@intel.com>
Reviewed-by: Zhang, He <he.zhang@intel.com>
Reviewed-by: Zhu, Jianjun <jianjun.zhu@intel.com>

Author: jianjunz

peerserver.js

@@ -99,6 +99,7 @@ function authorization(socket, next){
     case '3.3.1':
     case '3.4':
     case '3.4.1':
+    case '3.5':
       // socket.user stores session related information.
       if(token){
         validateUser(token, function(uid){  // Validate user's token successfully.