DNSSEC: update OpenDNSSEC KASP configuration
* remove unneeded parts
* increase KSK key length to 3072
* increase KSK key lifetime to 2 years (see NIST SP 800-81-2 section 11.2)
Update is not required, as template contains just recommended values
which should by reviewed by administrators.
https://fedorahosted.org/freeipa/ticket/4657
Reviewed-By: Petr Spacek <pspacek@redhat.com>