Don't show --force-ntpd option in replica install
    
    Always run the client installation script with --no-ntp
    option so that it does not show the message about --force-ntpd
    option that does not exist in ipa-replica-install. The time
    synchronization is done elsewhere anyway.
    
    https://fedorahosted.org/freeipa/ticket/6046
    
    Reviewed-By: Martin Basti <mbasti@redhat.com>