Neo4j: exclude test from Neo4j for the moment, until implemented correctly
partial fix for GPMONGODB-281 "Memory leak when instantiating large amounts of objects"

Now Mongo queries return a MongoResultList that only initializes objects on demand using the cursor instead of initializing all objects using toArray() as was the case before. This means you can iterate over larger datasets than before.

However, the fix is only partial because we still load and cache objects in the first level cache. We need to implement a stateless session mode for Mongo to allow skipping all caching layers (first level cache, second level cache etc.)