migrat UDT-QA data and models to HF

[NLPerWS]

could you migrat UDT-QA data and models to HF except Knowledge Source data, include: trained verbalizer model，Retriever data and models，thank you very much!

@Mayer123

[NLPerWS]

could you migrat all data and models in download_data.py to HF？thank you very much!! @Mayer123