ConvAI2 normalized text (#2466)
ConvAI2 normalized text (#2466)

* convai2 normalized

* da fixx

* lint

* moar

* transformer classifier default wrong

* fix
facebookresearch/ParlAI,facebookresearch/ParlAI,facebookresearch/ParlAI,facebookresearch/ParlAI,facebookresearch/ParlAI