Pillagers can be spawned in the cage

Pillagers can spawn in other structures such as cage and tent.

Mojang should fix this after they change the pillager spawn area to match Java edition.

Steps to Reproduce:

1. Open a new world and find a pillager outpost
2. Use glass pane to find some places pillager can spawn
3. Use some blocks to mark these places.

Observed Results:

Pillager will spawn in the watchtower, cage and tent when you finished to find some places pillager can spawn.

Expected Results:

1. Piallagers don't spawn in the cage.