[telemetry] Sort imports in Telemetry and its dependents.

tools/perf/page_sets/alexa1-10000.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 import json
 import os
 
+from telemetry.page.page import Page
 from telemetry.page.page_set import PageSet
-from telemetry.page.page import Page
 
 
 __location__ = os.path.realpath(
       os.path.join(os.getcwd(), os.path.dirname(__file__)))
 
 # Generated on 2013-09-03 13:59:53.459117 by rmistry using
 # create_page_set.py.
 _TOP_10000_ALEXA_FILE = os.path.join(__location__, 'alexa1-10000-urls.json')
 
 
@@ skipping 15 matching lines @@
       create_page_set.py.
   """
 
   def __init__(self):
     super(Alexa1To10000PageSet, self).__init__(user_agent_type='desktop')
 
     with open(_TOP_10000_ALEXA_FILE) as f:
       urls_list = json.load(f)
     for url in urls_list:
       self.AddUserStory(Alexa1To10000Page(url, self))