This makes IPA servers that publish their NTP services in LDAP searchable by
`server-role-find` and `server-find` command.
The list of active IPA NTP servers will be displayed in to output of `ipa
config-show` command.
https://fedorahosted.org/freeipa/ticket/5815
Reviewed-By: Petr Spacek <pspacek@redhat.com>
Reviewed-By: Martin Basti <mbasti@redhat.com>