Back out "Revert D69698406: gloo: async lazy connect" #426
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Summary:
Original commit changeset: 4cfad1d7b700
Original Phabricator Diff: D69698406
gloo: only shutdown device when async
See original PR for details and test plan: D69698406
This extends that PR with one small change to avoid shutting down Device when using non-async mode to preserve backwards compatibility for caffe2.
Reviewed By: fduwjj
Differential Revision: D72425729