message: Grappler item_test: fix item order dependency
  by replacing assertEqual() with assertItemsEqual()
  Fixes test failures such as:
  http://ci.tensorflow.org/view/Tensorflow%20Jenkins%20Monitored%20builds/job/nightly-matrix-cpu/TF_BUILD_IS_PIP=NO_PIP,TF_BUILD_PYTHON_VERSION=PYTHON3,label=cpu-slave/763/consoleFull
diff: @@ -56,7 +56,7 @@ class ItemTest(test.TestCase):
  mg = meta_graph.create_meta_graph_def(graph=g)
  grappler_item = item.Item(mg)
  op_list = grappler_item.IdentifyImportantOps()
  - self.assertEqual([b'Const', b'Const_1', b'add'], op_list)
  + self.assertItemsEqual([b'Const', b'Const_1', b'add'], op_list)
  def testOpProperties(self):
  with ops.Graph().as_default() as g:
  @@ -119,9 +119,8 @@ class ItemTest(test.TestCase):
  grappler_item = item.Item(mg)
  groups = grappler_item.GetColocationGroups()
  self.assertEqual(len(groups), 1)
  - self.assertEqual(
  - sorted(groups[0]),
  - ['Assign', 'RefIdentity', 'Variable', 'Variable/Assign'])
  + self.assertItemsEqual(
  + groups[0], ['Assign', 'RefIdentity', 'Variable', 'Variable/Assign'])
  if __name__ == '__main__':
  