[Reviewer Matt] Fixed #61 - Properly canonicalize AoRs to index registration store

Matt

As discussed can you review asap as I need to push the fix to the PES guys to unblock their testing, and I think Voldemort will hit the same thing.  I've regression tested with the UTs and the live tests, but I haven't forced the particular case (I will probably add a UT for it when things are less manic).  The PES guys will be able to check it is definitely fixing their problem pretty quickly as it is completely reproducible.

Mike