Revert "Allow for origin boundary to be null in an arena, and don't inherit origin boundary from parent. This allows for builtin arenas to not have any origin in the config yml file"

This won't work without the new arena caching, so I'm reverting this until that is implemented.

This reverts commit dcc14734caaf95fd4a4f9101c6d1beb86c6434cf.
Merge branch 'develop' into arena-caching