Updates to apply on 2017-09-27.v1

[alesaggio]

List of the things that need to be done to update 2017-09-27.v1 (please add whatever I may have forgotten):

• Fix calling of m_jet_bDiscrName_cMVAv2
• Fix sort of dijet object according to output value of btagger
• Add MET significance
• Store trigger SF for electrons
• Check emu category
• Add MT2

[OlivierBondu]

Can we close this one? we decided against adding MT2 because of the time it took to compute no?

(Maybe we can reopen the MT2 topic if Florian needs it for a NN?)

[alesaggio]

We dropped it because we were in a rush to relaunch the production so we decided to add it later on. If we don't really need it, we can close the issue and in case add it later for Florian.