propagate quantizer depth and factor args through w2v (#1892)
propagate quantizer depth and factor args through w2v (#1892)

Summary:
makes quantizer larger which helps accuracy in certain cases

Pull Request resolved: https://github.com/fairinternal/fairseq-py/pull/1892

Reviewed By: arbabu123

Differential Revision: D28630035

Pulled By: alexeib

fbshipit-source-id: ba5a902ff1623025e7566e901aa81cdf377a7aa0

pytorch/fairseq,pytorch/fairseq,pytorch/fairseq