Zombie villages don't generate

Seeds known to have zombie villages now generate normal villages instead.

Tested on seeds:
-4483815153575702622
748172663249778

Near spawn there's a village which appears as a zombie village in 1.12.2 but has a different shape and is not-zombified in 18w15a.

Screens of the same village on seed -4483815153575702622 but generated in different versions.