Adding Hadronic-path HLT DQM for B2G PAG

I'm adding a module to monitor the hadronic HLT paths for the B2G group that are under development. This module supports several modes : 

- Single jet (pt > X)
- Dijet (pt1 > x1 && pt2 > x2)
- Multijet (count all jets with pt > X, require > N)
- HT (calculate HT all jets with pt > X, require > X)

There will be monitoring elements versus jet mass in the future as well as any other relevant information.