Adding Validation files
adding changes to external decays
Update GGToHtautau_13TeV_pythia8_Tauola_taurhonu_cff_GEN_VALIDATION.py
Merge pull request #4707 from inugent/Tauola_114_7_2_X_patchv2

Tauola 114 7 2 x patchv2
Merge remote branch 'origin/CMSSW_7_2_X' into CMSSW_7_0_X