Add the ipa-pki-retrieve-key helper program and configure
lightweight CA key replication on installation and upgrade. The
specific configuration steps are:
- Add the 'dogtag/$HOSTNAME' service principal
- Create the pricipal's Custodia keys
- Retrieve the principal's keytab
- Configure Dogtag's CS.cfg to use ExternalProcessKeyRetriever
to invoke ipa-pki-retrieve-key for key retrieval
Also bump the minimum version of Dogtag to 10.3.2.
Part of: https://fedorahosted.org/freeipa/ticket/4559
Reviewed-By: Jan Cholasta <jcholast@redhat.com>
