Transfer Learning: Caffe2 load op changes to return shape inference (#22829)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/22829
Sending out caffe2 load op changes separately since we want pick it to open source.
This change is needed because the shape information of the blobs is determined from the load operator and that shape information is needed in our download_group.
Reviewed By: boryiingsu
Differential Revision: D16229465
fbshipit-source-id: f78b2df9a7f26968d70eca68dde75cd11ab6f7a2
