reset ldap.conf to point to newly installer replica after promotion
    
    When promoting a client to replica reset openldap client config so that it no
    longer uses remote master as default LDAP hosts but uses local connection to
    replica. Also make sure that the behavior regarding editing of user-customized
    config is consistent with the client installer.
    
    https://fedorahosted.org/freeipa/ticket/5488
    
    Reviewed-By: Martin Basti <mbasti@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>