Tau trigger DQM monitors all PFTau paths

Extend tau trigger DQM to automatically monitor all tau paths (i.e. paths containing the substring "PFTau"). The set of plots per path (depending on the path type) stays the same. The subfolder names change from
```
DoubleTau
EleTau
TauMET
...
```
to (e.g.)
```
HLT_DoubleMediumIsoPFTau30_Trk1_eta2p1_v4
HLT_Ele22_eta2p1_WP90NoIso_LooseIsoPFTau20_v7
HLT_LooseIsoPFTau35_Trk20_Prong1_MET70_v10
...
```
(i.e. all PFTau paths with their full name)

Rebased on top of CMSSW_7_1_X_2014-04-08-0200

FYI @mbluj