Moved vhost default for overide and options to parent class.

Good day

I make heavy use of hiera in my environment.

As opposed to having to define apache parameters options and override for each virtual host.
I would like to propose that it could be defined it in one location (i.e.  hieras default look up variable (e.g. common.yaml)).

I hope I have made my case clear, and that you will give my pull request consideration.

Kind Regards
Brent Clark