We need to test that createCollection properly updates the metadata for an unsharded collection.

Setup

1. Start a sharded cluster.
2. Create a collection (createCollection).

Check config metadata

1. Confirm there is an entry (under "_id") for the database in config.databases.
2. Confirm there is an entry (under "_id") for the new unsharded collection in config.collections.
3. Confirm there is an entry (under "ns") for the new unsharded collection in config.chunks.

Check shard metadata

1. Run _flushRoutingTableCacheUpdates on each shard.
2. Confirm there is an entry for the new unsharded collection in the config.cache.collections on each shard.