Foreman » Installer

fix config.pp

make pulp configurable

rewrite apache configuration

refs #7779 - Updating to add support for pulp docker

fixes #7296, BZ1135127 - switching to relying on apache for cert validation

fixes #7115 - specify cert options for nodes.conf

fixes #5845 - using new pulp httpd config files for 2.4

Refs #5377: Updates for Pulp 2.4 support.

Fixing templates to refer to variables properly.

While installing katello 'community' nighty today I noticed a few errors
related to how certain variables were being refered to in a couple of
templates:

```bash
Variable access via 'fqdn' is deprecated. Use '@fqdn' instead....

Cleaning up certs related files.