devserver: module import cleanup

* Import statements re-grouped: standard lib, third party,
  project-local; separated by a single line, preceded by a single line
  and followed by two lines. Each group is sorted alphabetically.

* Removed unused imports.

BUG=None
TEST=Passes unit tests.

Change-Id: Iee4f78b1256457bd19b2c159a29763ba3404c272
Reviewed-on: https://gerrit.chromium.org/gerrit/33859
Reviewed-by: Chris Sosa <sosa@chromium.org>
Commit-Ready: Gilad Arnold <garnold@chromium.org>
Tested-by: Gilad Arnold <garnold@chromium.org>
diff --git a/autoupdate_unittest.py b/autoupdate_unittest.py
index 2010bbf..4274ffb 100755
--- a/autoupdate_unittest.py
+++ b/autoupdate_unittest.py
@@ -6,15 +6,17 @@
 
 """Unit tests for autoupdate.py."""
 
-import cherrypy
 import json
-import mox
 import os
 import socket
 import unittest
 
+import cherrypy
+import mox
+
 import autoupdate
 
+
 _TEST_REQUEST = """
 <client_test xmlns:o="http://www.google.com/update2/request" updaterversion="%(client)s" >
   <o:app version="%(version)s" track="%(track)s" board="%(board)s" />