Fix cache key changes in dpkg-build elements
Two things were fouling up the cache keys:
- DpkgBuildElement.get_unique_key was using a field that changed during builds.
- Element.__dynamic_public was a reference to the same dict as Element.__public.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Two things were fouling up the cache keys: