        Outputs
        <ul>
        <li> network_out: Network's prediction tensor. The value of this tensor is given as input to convert_preds_to_locs to get the x,y pose location.
        <li> sess: Current TF session.
        <li> model_file_used: Model file used for initializing  the network.
        </ul>

      <p>Setup up prediction function.
          During prediction, the input image (after preprocessing) will be available in the im_input tensor. Return the prediction/output tensor and the TF sess