Add proof-of-concept ansible script for Warden server and Warden filer

contrib/ansible/warden-filer-receiver/defaults/main.yml

contrib/ansible/warden-filer-receiver/tasks/main.yml

...ler-receiver/templates/etc/defaults/warden_filer_receiver

...ible/warden-filer-receiver/templates/etc/warden_filer.cfg

contrib/ansible/warden-server/defaults/main.yml

contrib/ansible/warden-server/tasks/main.yml

...-server/templates/etc/apache2/sites-available/warden.conf

...sible/warden-server/templates/opt/warden-ra/warden_ra.cfg

...rden-server/templates/opt/warden-server/warden_server.cfg