ARTEMIS-2819

If, dynamically through management, I add a settings for an address (exact match) then later remove those settings, on re-reading the settings record for the same address, I expect to see the settings from higher in the hierarchy (or the root).  This does not occur.  It behaves as if the removal did not take case.

I wrote a ActiveMQServerControlTest that demonstrates the problem. Looking at the code, it appears the HierarchicalObjectRepository does not remove its copy from the cache in the exact match case.  Candidate PR raised upstream.