ipareplica_krb_enable_ssl: Initialize krb.pkcs12_info and krb.master_fqdn

These two settings are not set using the krb.init_info method, but used in
krb.enable_ssl.

The configuration of PKINIT fails in IPA 4.7.0 because of the issue
https://pagure.io/freeipa/issue/7655 where auto detection of the
master is not properly working. With the missing setting of krb.master_fqdn
the not workint auto detection has been triggered, which resulted in
failed PKINIT enablement.