official validation update

I have collected all the changes needed in order to include GEMs into the official validation package. Some of those changes are not needed for the official release but only for our purposes (like the changes in the cfg files in Validation/RecoMuon concerning the eta range, binning, etc...). I have also added the RMS plots modifying some modules into DQMServises. They are useful for us but they increase the final number of histrograms and so we have to decide if they can go into the official release.