Fixed linting errors

tests/automated/helpers.py

@@ -1,9 +1,5 @@
-import os
-import sys
 import time
 import random
-import subprocess
-import requests
 import _thread
 import faulthandler
 from functools import wraps

tests/automated/wifi_helpers.py

@@ -1,4 +1,9 @@
 import os
+import sys
+import time
+import subprocess
+import requests
+from panda import Panda
 FNULL = open(os.devnull, 'w')
 def _connect_wifi(dongle_id, pw, insecure_okay=False):
   ssid = "panda-" + dongle_id