fixed bug omitting muons from the lepton selection
implemented fix for possible vector out of range exceptions
Merge pull request #4490 from cms-btv-pog/JetFlavor-LeptonSelectionAndOutOfRangeFixes_from-CMSSW_5_3_X_2014-07-02-0200

Fix for jet flavor lepton selection and possible out of range exception: Backport from 7_2_X to 5_3_X