Fix missing file that fails DL1 replica installation
Replica installation on DL1 would fail to create a httpd instance
due to missing '/etc/httpd/alias/cacert.asc'. Create this file
in the setup_ssl step to avoid the error.
https://fedorahosted.org/freeipa/ticket/6393
Reviewed-By: Jan Cholasta <jcholast@redhat.com>