Don't try to backup CS.cfg during upgrade if CA is not configured
https://pagure.io/freeipa/issue/7409
Signed-off-by: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Fraser Tweedale <ftweedal@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Fraser Tweedale <ftweedal@redhat.com>