benchmark

3e7bf736 - Use opacus version < 1.0 to mitigate BC-breaking API change (#605)

Use opacus version < 1.0 to mitigate BC-breaking API change (#605) Summary: Opacus 1.0.0 changes its API https://github.com/pytorch/opacus/blob/main/Migration_Guide.md, which breaks this model. This PR pins opacus to an old version which doesn't introduce this BC-breaking change. Pull Request resolved: https://github.com/pytorch/benchmark/pull/605 Reviewed By: zou3519 Differential Revision: D32802416 Pulled By: xuzhao9 fbshipit-source-id: 78bc16a625251752b6d313c44bf3dfa67f595a0e