[Merge] lp:~ubuntu-core-dev/ubuntu-release-upgrader/split into lp:ubuntu-release-upgrader

[Ken VanDine]

Review: Needs Fixing

The symlinks to files included in python-update-manager should probably be removed.  That is a temporary package, better to fix the imports.
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https://code.launchpad.net/~ubuntu-core-dev/ubuntu-release-upgrader/split/+merge/109209
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