Return an error for a failed rolling deployment #1589
Merged
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This extends the messages from "git push" that should be considered as a deployment error (If one of these messages is found, the push command's exit code will be 87 - non-zero, indicating failure).
It adds "Could not perform a rolling deployment", which occurs if
--deploy-strategy=rollingis used when a rolling deployment is not possible, e.g. when a stateful service has to change.