Migrate HLTTauDQMOfflineSource to DQMEDAnalyzer
Remove calls to TH1::Sumw2()

They're were probably not needed anyway.
Take HLT menu parsing out of bookHistograms()
Add in the PhotonValidator plots for E/Etrue vs Ntvx, sigmaE/E vs eta, et, NVtx, update plotting scripts and layout
Update PhotonValidato and TkConvValidator to be compliant with multithreading
Remove unneeded flags
Merge pull request #3134 from nancymarinelli/egmValidationMigrationToMultiThread

DQM -- Validation/RecoEgamma migration to multi thread
Merge pull request #3063 from makortel/tautriggerdqmDQMEDAnalyzer

DQM -- Migrate Tau HLT DQM to DQMEDAnalyzer
Merge pull request #3145 from ojeda/remove-flag

DB -- Remove unneeded flags
Merge remote branch 'origin/CMSSW_7_1_X' into CMSSW_7_0_X