When we promote an IPA client to replica, we need to write master-like
default.conf once we start configuring directory server instance. This way
even if DS configuration fails for some reason the server uninstall code can
work properly and clean up partially configured replica.
https://fedorahosted.org/freeipa/ticket/5417
Reviewed-By: Petr Vobornik <pvoborni@redhat.com>