Make sure that ReleaseUpgrader and PackageTaskHandler tests can be run with AptFacade instead of SmartFacade.
For ReleaseUpgrader I simply remove the setup of a facade, since the facade isn't used by ReleaseUpgrader.
For PackageTaskHandler I made a change to AptFacade to be able to set the architecture to None. This makes the PackageTaskHandler tests pass, if I change them to use AptFacadeHelper instead of SmartFacadeHelper.
I didn't bother actually running the tests for both SmartFacade and AptFacade, since the changes are minimal. When the time comes to remove SmartFacade we can change it to use AptFacadeHelper, without changing anything else.