Another Tau trigger DQM fixes

This request consist of set small fixes to Tau trigger DQM:
- Refreshed definition of offline reference objects (DQMOffline/Trigger/python/HLTTauDQMOffline_cfi.py)
- Looser default dR value for offline-HLT matching (DQMOffline/Trigger/src/HLTTauDQMOfflineSource.cc)
- Another fix for matching with generic EGamm filters and better handling of lepton+tau L1 cross-seeds (DQMOffline/Trigger/src/HLTTauDQMPath.cc)