httpinstance: add ipa-ca.$DOMAIN alias in initial request
For detailed discussion on the purpose of this change and the design
decisions made, see `git log -1 $THIS_COMMIT~2`.
For new server/replica installation, issue the HTTP server
certificate with the 'ipa-ca.$DOMAIN' SAN dNSName. This is
accomplished by adding the name to the Certmonger tracking request.
Part of: https://pagure.io/freeipa/issue/8186
Reviewed-By: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>