Dogtag 9 CA and CA DS install and uninstall code was removed. Existing
Dogtag 9 CA and CA DS instances are disabled on upgrade.
Creating a replica of a Dogtag 9 IPA master is still supported.
https://fedorahosted.org/freeipa/ticket/5197
Reviewed-By: David Kupka <dkupka@redhat.com>