[Merge] ~ack/ubuntu/+source/maas:snap-channel-2.7-default into ubuntu/+source/maas:ubuntu/focal-devel

[Alberto Donato]

> I'd avoid renaming the template, as that just causes churn in the database I
> suppose.

Is that a big deal?
I renamed it as the new name is more correct, and the old option has unlikely been ever used since we were always appending the "/ubuntu-$release" branch, which only existed for 20.04.
I can revert to the old name if it's an issue.

> 
> The version logic to not do the migration also triggers if you removed the
> maas snap (but not purged) and then reinstalled - is that correct?

If you previously had installed a 1:* release, the migration would have been performed. Removing and reinstalling the deb shouldn't do anything in that case too.
-- 
https://code.launchpad.net/~ack/ubuntu/+source/maas/+git/maas/+merge/384013
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