Resnet18 trained with TAO has low accuracy on some classes after exporting to TensorRT and serving with Triton

[Morganh]

For standalone inference, please refer to Inferring resnet18 classification etlt model with python - #10 by jazeel.jk and Inferring resnet18 classification etlt model with python - #41 by Morganh
For triton inference, please refer to Tao-converted .plan model running in triton-server turned to bad accurate - #47 by Morganh