Remove Nginx role dependency, as it's been abandoned and no longer works. Adding documentation instructing users to include the official Nginx role if they need it. Also added a check to throw an error if a user has graylog_install_nginx set to True. If they have it set to False, it will continue as normal.
Remove Nginx role dependency, as it's been abandoned and no longer works. Adding documentation instructing users to include the official Nginx role if they need it. Also added a check to throw an error if a user has
graylog_install_nginxset toTrue. If they have it set toFalse, it will continue as normal.Fixes #144