Make sure uninstall script prompts for reboot as last
    
    Parts of client uninstall logic could be skipped in attended
    uninstallation if user agreed to reboot the machine. Particulary,
    the uninstall script would not try to remove /etc/ipa/default.conf
    and therefore subsequent installation would fail, client being
    detected as already configured.
    
    https://fedorahosted.org/freeipa/ticket/3462
    https://fedorahosted.org/freeipa/ticket/3463