Fix Mongoclient should be closed not disconnected
Fix Mongoclient should be closed not disconnected

quarkslab/irma,hirokihamasaki/irma,hirokihamasaki/irma,quarkslab/irma,hirokihamasaki/irma,hirokihamasaki/irma,quarkslab/irma,quarkslab/irma,hirokihamasaki/irma