Bugfix for switch node labels getting wrong after some time.

Change-Id: Ibbab82aa09a5ff5650b7435464943fad3b9e20e2
diff --git a/web/simple_web_server.py b/web/simple_web_server.py
index 14fa05d..3abd0b0 100755
--- a/web/simple_web_server.py
+++ b/web/simple_web_server.py
@@ -17,7 +17,7 @@
 @app.route('/', methods=['GET'])
 @app.route('/<filename>', methods=['GET'])
 @app.route('/js/<filename>', methods=['GET'])
-def return_file(filename):
+def return_file(filename="/"):
   if request.path == "/":
     fullpath = "./simple-topo.html"
   else:
@@ -50,8 +50,7 @@
 @app.route('/wm/', defaults={'path':''})
 @app.route('/wm/<path:path>')
 def rest(path):
-  url="http://localhost:8080/wm/" + path
-  print url 
+  url="http://%s:%s/wm/%s" % (RestIP, RestPort, path)
   try:
     response = urlopen(url)
   except URLError, e:
@@ -61,11 +60,9 @@
     print "ONOS REST IF %s has issue. Code %s" % (url, e.code)
     result = ""
 
-  print response
   result = response.read()
   return result
 
 if __name__ == "__main__":
   app.debug = True
   app.run(threaded=True, host="0.0.0.0", port=9000)
-#  app.run(threaded=False, host="0.0.0.0", port=9000)