RhodeCode working

Recipie for rhodecode in hg module.
Private stub has the installation configs for rhodecode
The current version of `nginx::hostconfig` has a _mandatory_ `$log` parameter. Furthermore, I'd prefer using the actual (HTTP) host name as `namevar` instead of `'default_rhodecode'`. Most of our modules do that already, usually by passing on a `$domain` parameter given to the outer class (see e.g. `modules/discourse/manifests/init.pp`).