added possibility to update a key in ParametricSingleton
added possibility to update a key in ParametricSingleton

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