Draft: Tier0Tests modernisation and cleanup
Tier0 tests (RunTier0Tests.py) are a popular and nice tool but which unfortunately got a bit too big. In an effort to make the infrastructure reusable (for example for RunUpgradeTests.py) I started some cleanup. The idea is to have object-based base infrastructure which can then be implemented for individual tests.
For now I created a base Tier0Test which can be executed in a clean or patched environment. The overlay test was ported over and integrated in the existing steering.
@amete, does this look similar enough to what you proposed?