title: restoring Tensorflow model: cannot find gamma/scale for batch_norm layers in the checkpoint file
body: <p>I am able to restore a model and extract parameters for weights, biases and batch_norm layers from checkpoint files.
  However for multiple checkpoint files (inception models etc.), I cannot find the scaling/gamma factor of the BN layer. </p>
  
  <p>For example, in the public inceptionV3 checkpoint, I can locate:
  <code>InceptionV3/Mixed_5d/Branch_2/Conv2d_0a_1x1/BatchNorm/moving_mean (DT_FLOAT) [64]</code>
  <code>InceptionV3/Mixed_5d/Branch_2/Conv2d_0a_1x1/BatchNorm/moving_variance (DT_FLOAT) [64]</code>
  <code>InceptionV3/Mixed_5d/Branch_2/Conv2d_0a_1x1/BatchNorm/beta (DT_FLOAT) [64]</code></p>
  
  <p>However, there is nothing such as <code>InceptionV3/Mixed_5d/Branch_2/Conv2d_0a_1x1/BatchNorm/gamma</code>.</p>
  
  <p>How can I get the gamma value or it is rescaled to 1 by default?</p>
  
  <p>Thanks a lot!</p>