title: Parsing TFRecord when in eager execution
body: <p>Considering that <a href="https://stackoverflow.com/a/49659358/4743714">is possible to run</a> <code>tf.Data.Datasets</code> in eager execution mode, how should I open a TFRecord file on eager execution? I'm more concerned about the parser writing, because I'm currently using <code>dataset.make_one_shot_iterator</code> as an iterator (between several images on my container).</p>