James E. Blair 61a76f95f0 Add retries to promote-docker-image
This should make this step more robust to remote failures.

Change-Id: I3f3d643ac5285027bda909ac6d55d8959a4b4f79
2019-03-20 09:02:18 -07:00
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2019-03-20 09:02:18 -07:00