update of muon HLT validation DQM code 

 * cleaning of the list of paths monitored in `HLTMuonOfflineAnalyzer` and addition of new paths
 * in `hltMuonValidator_cfi.py`: reorder the regular expression according to the actual name of muon paths in the HLT menu
 * fix a bug in `HLTMuonValidator.cc` to monitor tracker muon paths with no isolation