server upgrade: fix upgrade in CA-less
Use /etc/httpd/alias instead of /var/lib/ipa/radb in upload_cacrt, as
/var/lib/ipa/radb is not populated in CA-less.
Do not migrate ipaCert from /etc/httpd/alias to /var/lib/ipa/radb in
CA-less, as it might be an incorrect certificate from previous CA-ful
install, and is not necessary anyway.
https://fedorahosted.org/freeipa/ticket/5959
Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>