Sync with upstream

We're using arrays in stored procedures in Bifrost now.  The upstream repo has a couple commits that add to / fix array support.  This addresses the bit of interestingness I found at https://github.com/opscode/oc_bifrost/commit/f711e58cd38213626978e2571dca81010a83f859

The unit tests pass, but this hasn't yet been tested in the rest of our applications (erchef, bifrost, reporting, etc.).  Putting it out for consideration now, though.