Homebrew Cron update should use Homebrew::User

[Mitsuwa]

If you include the homebrew class and override the $user and $group

class {'homebrew':
  user  => $user,
  group => $group;
}

You are going to have problems with running homebrew update cron, as the homebrew update cron will attempt to run as root
https://github.com/gildas/puppet-homebrew/blob/master/manifests/init.pp#L233

Which will error

Error: Cowardly refusing to 'sudo brew update'
You can use brew with sudo, but only if the brew executable is owned by root.
However, this is both not recommended and completely unsupported so do so at
your own risk.

if you update this
https://github.com/gildas/puppet-homebrew/blob/master/manifests/init.pp#L233

to use $homebrew::user you won't have this problem. Also, since $homebrew::user already defaults to root, it should be pretty safe to do
https://github.com/gildas/puppet-homebrew/blob/master/manifests/init.pp#L79