Distributed iterator performance degradation

While testing out DistributedStreamRehashStressTest the number of invocations is not as high as it should be when testing out iteration. Something has regressed since it was originally written.

I have found https://github.com/infinispan/infinispan/blob/master/core/src/main/java/org/infinispan/container/DefaultDataContainer.java#L417 which helped immensely, however there is still some other issue causing performance loss.