Add huggingface sentiment analysis processor

[jennyzhang-petuum]

Is your feature request related to a problem? Please describe.
Huggingface sentiment analysis processor takes in model on hugging face platform with pipeline tag of
text-classification.

Describe the solution you'd like
This wrapper could take any model name on HuggingFace platform with pipeline
tag of sentiment-analysis in configs to make prediction on the user
specified entry type in the input pack and the prediction result goes to the
user specified attribute name of that entry type in the output pack.