Migration of Higgs validation packages to DQMEDAnalyzer and DQMEDHarvester interface + add few plots in the Higgs validation directory

The PR contains in fact two parts: 
-first is the migration of the Higgs validation package to the DQMEDAlayzer and DQMEDHarvester interface. I followed the recipe according to:
https://twiki.cern.ch/twiki/bin/view/CMS/ThreadedDQM

-second is an addition of few plots:
   -> a summary plot for each analysis showing the efficiency of every path of the analysis in the same plot
   -> a plot showing for each path the efficiency versus the number of interactions in the event


I estimated the increase of memory using the recipe in https://twiki.cern.ch/twiki/bin/viewauth/CMS/DQMStoreStats

 subsystem/folder | histograms | bins |Empty bins | Empty/Total  | bins per histogram | MB | kB per histogram 
------------- | -------------  | -------------  | -------------  | -------------  | -------------  | -------------  | -------------
Standard  | 240 | 9720 | 8547 | 0.879 | 40.5 | 0.0371| 0.158
with plots added       |  298  | 10156 | 8875 | 0.874 | 34.1 | 0.0387 | 0.133