GitLab

Summary:
Pull Request resolved: https://github.com/facebookresearch/d2go/pull/301

This is a follow-up of earlier work to extract part responsible for the
centrally defined parameters from the helper in train_net closer to where the
parameters are defined.

Reviewed By: tglik

Differential Revision: D37176212

fbshipit-source-id: 226415f36f4872ac3d9ba41541b4389a18cc11e6