Add compare_namespaces.py helper
Add compare_namespaces.py helper

Summary: Pull Request resolved: https://github.com/fairinternal/fairseq-py/pull/597

Differential Revision: D15432965

Pulled By: myleott

fbshipit-source-id: 4471a2a8bb468bb639a80f977ab4c20480acb461

pytorch/fairseq,pytorch/fairseq,pytorch/fairseq