Inconsistency over whether self-signed certificates are autogenerated for testing

[manics]

The comment in https://github.com/IDR/deployment/blob/IDR-0.4.5/ansible/idr-proxy.yml#L87 states self-signed Nginx SSL certificates will be created unless idr_nginx_ssl_production: True, which for production is stored in a private vars file. However the conditional when: "{{ not idr_nginx_ssl_production | default(False) | bool }}" defaults to False not True.