juju/juju — pull request #487 by axw (2014-08-11 08:46:17+00:00)
Title: Only set Safe.{J,WMode} in production

As of Mongo 2.6, attempting to set Safe.J
fails if journaling is disabled in mongod.
Similarly, WMode=majority will cause problems
if a replicaset is not configured. We need
to only set these in production, where those
conditions are guaranteed to be true.