Make bind9 Berkshelf compatible, add 'config_file' option, discard auto-activation of 'ns.domain' and 'domain' A records

This is a set of small changes, which I'll be happy to factor out as needed.

1) Add 'name' to metadata.rb so that bind9 is compatible with Berkshelf.
2) Activate a 'config_file' to create named.conf, especially for CentOS hosts.
3) Discard auto-activation of 'ns.domain' and 'domain' A records. 'ns.domain' may point to a different host, and the bare 'domain' record normally points to a web server, not a DNS server.