Issues with finetune examples

[jingyanwangms]

• There're two sets of notebooks and it looks confusing: https://github.com/microsoft/AzureML-BERT/tree/master/finetune/PyTorch/notebooks

• There're two run_classifier_azureml.py. Also confusing https://github.com/microsoft/AzureML-BERT/blob/master/finetune/PyTorch/run_classifier_azureml.py https://github.com/microsoft/AzureML-BERT/blob/master/finetune/run_classifier_azureml.py
• Need to add better instruction for downloading glue data. Right now the script threw no request module error.
• https://github.com/microsoft/AzureML-BERT/blob/master/finetune/run_classifier_azureml.py line 28 should be sys.path.append("./pretrain/pytorch/")