Dan Mace 6db9601772 Support asymmetric rolling rollbacks ...

Improve the rolling updater rollback/abort function by making it aware
of the original replicas annotation: if the rollback target has the
original replica count recorded, prefer it over the desired annotation
since the update from old to new could have been asymmetrical.

For example, when scaling from 5 to 10, aborting should scale back to 5.

2015-09-29 09:00:02 -04:00

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