Pass through room version to event auth

synapse/api/auth.py

synapse/event_auth.py

synapse/handlers/federation.py

synapse/handlers/message.py

synapse/handlers/room.py

synapse/state/__init__.py

synapse/state/v1.py

synapse/state/v2.py

tests/state/test_v2.py

tests/test_event_auth.py