Fix documentation for namespace types. Remove unused ReflectiveDBCollectionInvoker. Simplify tests, align bean name to mongoClient. Remove injection of Mongo in favor of injecting MongoTemplate.
Remove throws declaration from AbstractMongoConfiguration.mongoClient(). MongoClient creation does not throw checked exceptions so throwing an Exception is no longer required. Replace Mongo by MongoClient in reference documentation.
Original pull request: #451.
19c8788376