Fixes and updates to the HLT Run2 menu, other will follow - 73 x

The following fixes have been integrated in the HLT menu:
- Use corrected calo jets insteadof uncorrected ones in HLT_BTagMu_*Jet*_Mu5 paths, CMSHLT-180
- Changing thresholds for HLT_AK8PFHT850_TrimR0p1PT0p03Mass50, CMSHLT-179
- Changing pt cuts of muon + photon trigger, CMSHLT-182
- Update of the dielectron path, CMSHLT-183
- Modify prescales (now 1) in EXO photon trigges, CMSHLT185
- Corrected alpha-T triggers, CMSHLT-187
- Migration to CMSSW_7_2_3_HLT4 ConfDB template
- HLT_PFMET110_PFMHT110 -> HLT_PFMET120_PFMHT120, CMSHLT-186
- Update calomet filter cut in HT+MET path, CMSHLT-191
- Fix of HLT_Mu25_TkMu0_dEta18_Onia, CMSHLT-192