Mounted acs-workflow by default. It is confusing not to do so because
it is listed as a core package that "probably isn't meant to be mounted"
by site map, and yet it is designed to be mounted. I think that all
core packages designed to be mounted should be mounted at install time
but haven't gone through to make sure we're consistent.
acs-workflow has to be part of the core because the CR needs it.
