box.schema.space.bless is not called when recovering from snapshot

[Roman Tsisyk]

1. Create a space

localhost> space = box.schema.create_space('tweedledum', { id = 0 })
---
...
localhost> space:create_index('primary', 'hash', { parts = { 0, 'num' }})
---
...
localhost> box.space[0].index[0].iterator
---
- 'function: 0x409c9940'
...

2. Restart Tarantool to recovery from xlogs

localhost> box.space[0].index[0].iterator
failed to send admin query
reconnected
---
- 'function: 0x41601f20' <!-- Works properly
...

3. Save a snapshot
localhost> box.snapshot()
---
- ok
...

4. Restart Tarantool to recovery from the snapshot
localhost> box.space[0].index[0].iterator
failed to send admin query
reconnected
---
- null <!-- Metatable is not set
...