Niels de Vos 607129171d rbd: move image metadata key migration to its own function
The new MigrateMetadata() function can be used to get the metadata of an
image with a deprecated and new key. Renaming metadata keys can be done
easily this way.

A default value will be set in the image metadata when it is missing
completely. But if the deprecated key was set, the data is stored under
the new key and the deprecated key is removed.

Signed-off-by: Niels de Vos <ndevos@redhat.com>
2021-07-26 11:49:56 +00:00
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