enable debugging of ntpd during client installation
    
    When installing IPA client in debug mode, the ntpd command spawned during
    initial time-sync with master KDC will also run in debug mode.
    
    https://fedorahosted.org/freeipa/ticket/4931
    
    Reviewed-By: Jan Cholasta <jcholast@redhat.com>
    Reviewed-By: Martin Basti <mbasti@redhat.com>