[Merge] lp:~barry/update-manager/673297-py27 into lp:update-manager

[Barry Warsaw]

With this change, and no-change rebuilds for gnome-python, python-apt, and dbus-python, Update Manager will work with Python 2.7 on Natty.
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https://code.launchpad.net/~barry/update-manager/673297-py27/+merge/40510
Your team Ubuntu Core Development Team is requested to review the proposed merge of lp:~barry/update-manager/673297-py27 into lp:update-manager.