Currently we implicitly create an unsharded collection on the following paths:

1. aggregation
2. renameCollection
3. convertToCapped
4. mapReduce
5. moveChunk (on the recipient when receiving the first chunk for a collection)
6. movePrimary (on the recipient)

We want disallow implicit collection creation for all namespaces that are not any of:

1. temp collections
2. collections on the config server
3. local/admin collections
4. system.profile

If a namespace does not fall into any of these categories, we should throw CannotImplicitlyCreateCollection.