Foreman » Installer

Removing unused templates, references to /usr/share/katello and adding
new parameter declarations for backend service modules.

adding post_sync_url secret token

Removing unused conf.d templates

adding vhost configuration for foreman

requires https://github.com/theforeman/puppet-foreman/pull/153

First pass at updates to parameterize and make use of newer puppet
modules for configuring and setting up the Katello engine.