Pretrained weights being downloaded from huggingface even if downloaded earlier
**Describe the bug**
I have been using the language model for bert pre training and also bert classifier and every time when I restart the container it goes to download the models and updates the existing ones.
I think it should first check for the directory which is present in the code but still it goes for downloading the pre trained weights from the hugging face link when training starts

**Steps/Code to reproduce bug**
Just download the weights for the first time and trying running the same container second time without net access. If we check the directory model weights are there still it tries to download.

**Environment overview (please complete the following information)**

 - Image pulled from NGC cloud. version 1.0.1
