Comment 1 for bug 1729593

This will be fixed in https://github.com/snapcore/snapcraft/pull/1638

snapcraft/tests/__init__.py will have nothing.
Everything that's shared between unit and integration tests will be a module in snapcraft/tests. Things that are specific will be in snapcraft/tests/unit or snapcraft/tests/integration.

snaps_tests will die, so I will keep moving tests out of it.