title: Tensorflow/Cloud Datalab : Restore called with invalid save path
body: <p>I am training a model in the Cloud with Cloud ML from a Cloud Datalab notebook.
  I'd like to evaluate the model locally with.</p>
  
  <pre><code>%mlalpha train
  package_uris: $package_path_local
  python_module: trainer.task
  args:
    eval_data_paths :  ...# local or gs://
  </code></pre>
  
  <p>I all cases (local or remote I get the following error:</p>
  
  <pre><code>Restore called with invalid save path: u'[path to checkpoint file]'. File path is: u'[path to checkpoint file]'
  </code></pre>
  
  <p>However evaluating on the cloud works fine. Tensorflow version in latest Cloud Datalab is 0.11rc0</p>