Update acceptance-small.sh from b_lov branch. Allows fully specifying

LOV/non-lov configs and/or not running one of those configs, and which of
runtests, sanity, bonnie, dbench NOT to run (by default everything is run).

It could probably just be set up to take a list of configs as command-line
arguments to test instead.  We currently ignore the entire issue of mutli-
client setup.