[EnMasse] AddressController performance / ConfigMap lookups

[Lohmann Carsten (INST/ECS4)]

> > I agree that there should be some benchmarks being done here first. We will do
> them shortly.
> > Do you think it would be better to do these tests with current master (including
> the "Refactor controllers in standard and address controller" change) ?
> 
> I have a branch with some improvements in the agent for more efficiently handling
> addresses. I was only testing in the 1000-2000 address range so there will likely be
> more changes needed. I am debugging remaining failures from full system tests
> runs (in brokered space) and will merge when that looks good:
> https://github.com/EnMasseProject/enmasse/pull/981
> 
Ok, good, I'll watch the pull request and use the changes for the tests after they've been merged.