docs(py): Guide for exclude url

> user path route

pinpoint-apm#609

testapps/django/mysite/mysite/settings.py

@@ -48,8 +48,9 @@
 set_agent("cd.dev.test.django", "cd.dev.test.py",
           'tcp:dev-collector:10000', -1, 0, logging.DEBUG)
 
+
 MIDDLEWARE = [
-    'pinpointPy.Django.DjangoMiddleWare',
+    'polls.middleware.UserMiddleWare',
     'django.middleware.security.SecurityMiddleware',
     'django.contrib.sessions.middleware.SessionMiddleware',
     'django.middleware.common.CommonMiddleware',

testapps/django/mysite/polls/middleware.py

@@ -0,0 +1,15 @@
+from pinpointPy.Django import DjangoMiddleWare
+
+
+def UserMiddleWare(get_response):
+
+    pinpoint_handle_request = DjangoMiddleWare(get_response)
+
+    def user_request_route(request):
+        if request.path in ['/heart_check']:
+            response = get_response(request)
+        else:
+            response = pinpoint_handle_request(request)
+        return response
+
+    return user_request_route