Switch Docker image onda-cuda-cxx11-ubuntu1604 to new uniform name (#29943)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/29943
This was apparently the same as "pytorch/pytorch-binary-docker-image-ubuntu16.04:latest",
so standardize on that name.
Test Plan:
This PR, which is stacked on top of a commit that puts one of the jobs
using that container into the set of PR builds.
Imported from OSS
Differential Revision: D18653554
fbshipit-source-id: 40e6c52db02265d61e8166bb1211376faccfc53a
