Backported changes from CMSSW_7_1_X_sherpa2 to 6_2_X, reversing the changes in the RNG
Missed to delete one line
move to pythia8 185
Merge pull request #3487 from mkirsano/topythia8185_62X

Generator update -- move to pythia8 185
Merge pull request #3481 from thuer/CMSSW_6_2_X_sherpa2

Generator update -- Cmssw 6 2 x sherpa2
Merge remote branch 'origin/CMSSW_6_2_X' into CMSSW_7_0_X