message: Fix freeze_graph_test with correct parameters
  This will fix _testFreezeGraph to call freeze_graph() with correct parameters
  input_meta_graph is passed in position of variable_names_blacklist that should be empty string
  Also remove input_meta_graph that is not used with this fix
diff: @@ -51,8 +51,6 @@ class FreezeGraphTest(test_util.TensorFlowTestCase):
  def _testFreezeGraph(self, saver_write_version):
  checkpoint_prefix = os.path.join(self.get_temp_dir(), "saved_checkpoint")
  - checkpoint_meta_graph_file = os.path.join(self.get_temp_dir(),
  - "saved_checkpoint.meta")
  checkpoint_state_name = "checkpoint_state"
  input_graph_name = "input_graph.pb"
  output_graph_name = "output_graph.pb"
  @@ -85,7 +83,6 @@ class FreezeGraphTest(test_util.TensorFlowTestCase):
  filename_tensor_name = "save/Const:0"
  output_graph_path = os.path.join(self.get_temp_dir(), output_graph_name)
  clear_devices = False
  - input_meta_graph = checkpoint_meta_graph_file
  freeze_graph.freeze_graph(
  input_graph_path,
  @@ -99,7 +96,7 @@ class FreezeGraphTest(test_util.TensorFlowTestCase):
  clear_devices,
  "",
  "",
  - input_meta_graph,
  + "",
  checkpoint_version=saver_write_version)
  # Now we make sure the variable is now a constant, and that the graph still
  