Fix import order with isort tool.

tools/telemetry/telemetry/value/scalar_unittest.py

 # Copyright 2013 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 os
 import unittest
 
 from telemetry import value
 from telemetry.page import page_set
 from telemetry.value import scalar
 
+
 class TestBase(unittest.TestCase):
   def setUp(self):
     self.page_set = page_set.PageSet(file_path=os.path.dirname(__file__))
     self.page_set.AddPageWithDefaultRunNavigate("http://www.bar.com/")
     self.page_set.AddPageWithDefaultRunNavigate("http://www.baz.com/")
     self.page_set.AddPageWithDefaultRunNavigate("http://www.foo.com/")
 
   @property
   def pages(self):
     return self.page_set.pages
@@ skipping 65 matching lines @@
       'type': 'scalar',
       'name': 'x',
       'units': 'unit',
       'value': 42.4
     }
 
     v = value.Value.FromDict(d, {})
 
     self.assertTrue(isinstance(v, scalar.ScalarValue))
     self.assertEquals(v.value, 42.4)