b=12461

r=adilger (original patch and inspection of updates to it)
Some updates so that acceptance-small.sh can be run on a patchless client
using a remote OST and MDT.
Credit goes to adilger.  Most of this is his work.  I just shepherded it
through the process.
My batch of updates to the same end is still to come.  Still to be inspected
in fact.