message: Enable running initializer nodes for MetaGraph loading in freeze_graph. Also,
  fix support for running multiple comma separated initializers.
diff: @@ -93,6 +93,8 @@ def freeze_graph_with_def_protos(input_graph_def,
  restorer = saver_lib.import_meta_graph(
  input_checkpoint + ".meta", clear_devices=True)
  restorer.restore(sess, input_checkpoint)
  + if initializer_nodes:
  + sess.run(initializer_nodes.split(","))
  else:
  var_list = {}
  reader = pywrap_tensorflow.NewCheckpointReader(input_checkpoint)
  @@ -108,10 +110,10 @@ def freeze_graph_with_def_protos(input_graph_def,
  saver = saver_lib.Saver(var_list=var_list)
  saver.restore(sess, input_checkpoint)
  if initializer_nodes:
  - sess.run(initializer_nodes)
  + sess.run(initializer_nodes.split(","))
  - variable_names_blacklist = (variable_names_blacklist.split(",") if
  - variable_names_blacklist else None)
  + variable_names_blacklist = (variable_names_blacklist.split(",")
  + if variable_names_blacklist else None)
  output_graph_def = graph_util.convert_variables_to_constants(
  sess,
  input_graph_def,
  