Btag threaded dqm

Serveral changes:
- switch to CHS jets
- remove producer in the DQM sequence: JEC applied on the fly -> small bias in CSV tagger for example but OK for release to release comparisons
- Able PU jets classification
- Update configuration file to run on the GRID
- Start switching to threaded DQM modules: implement DQMEDAnalyzer, update the way of booking the histograms using DQMStore::IBooker