Change DataStores to accept 'database' param.

synapse/app/federation_sender.py

synapse/app/user_dir.py

synapse/replication/slave/storage/_base.py

synapse/replication/slave/storage/account_data.py

synapse/replication/slave/storage/client_ips.py

synapse/replication/slave/storage/deviceinbox.py

synapse/replication/slave/storage/devices.py

synapse/replication/slave/storage/events.py

synapse/replication/slave/storage/filtering.py

synapse/replication/slave/storage/groups.py

synapse/replication/slave/storage/presence.py

synapse/replication/slave/storage/push_rule.py

synapse/replication/slave/storage/pushers.py

synapse/replication/slave/storage/receipts.py

synapse/replication/slave/storage/room.py

synapse/storage/_base.py

synapse/storage/data_stores/main/__init__.py

synapse/storage/data_stores/main/account_data.py

synapse/storage/data_stores/main/appservice.py

synapse/storage/data_stores/main/client_ips.py