addPlotForFracChargeRelValMonitoring

Add two plots to the Tk DQM for the monitoring of frac. charged signal in relVals.
This changes were discussed at the PdmV/DQM Joint meeting of the 28th of october: https://indico.cern.ch/event/294179/

uhmm, but above all, is it allowed to have only some paraemters defined by the fillDescription method and the rest by the cfi file ?
I'm a little bit puzzled ... I mean, does it work in this way ?