Request load balancing is not working correctly in the C++ client

This was found by running the ClientAsymmetricClusterTest. The test case configures a replicated cache on one of the RemoteCacheManagers in a two node cluster. Since the cluster is replicated, the consistent hash does not apply, and a request balancing strategy is employed on the client so that all requests don't go to the same node. The test case performs 6 cache operations in an attempt to trigger a request to the node where the cache has not been defined. Currently this does not cause the expected CacheNotFoundException to be thrown.