added setcurrentfolder missing in MuonIsolationDQM.cc
Merge pull request #6742 from folguera/MuonDQM_73X_MuonIsoFix

added setcurrentfolder missing in MuonIsolationDQM.cc
Merge remote branch 'origin/CMSSW_7_3_X' into CMSSW_7_0_X