add PV trimmer
add also track_pt_min parameter (consistency check added, in case PV producer and PV comparer have different threshold a LogWarning is raise
add configuration for PVClusterComparer (it should be used as refToPSet_)
fix use of DQMStore in DQMEDAnalyzer
Remove code duplication for FilterUnit convention: added static function for generating file names for ROOT and PB format, modified saveForFilterUnit and saveForFilterUnitPB for saving the contents of DQMStore for ROOT and PB format.
Added the DQMFileSaver configuration parameter for setting the file format.
add import of PVcomparer PSet
Change ClustersFromRawProducer to a stream module

The ClustersFromRawProducer puts a helper it owns into the DetSetVector
so it is necessary for this module to be a stream module so each Event
gets its own helper. This avoids problems in the threaded framework when
multiple Events are being processed.
This code will have to be revisited when we start to use multiple threads
for one Event.
Changes SiStripClsuterToDigiProducer to stream module

We believe it is safe to convert this to a stream module to allow
efficient processing when using multiple threads.
Revert CSCSegmentProducer back to legacy module

The CSCSegmentProducer uses CLHEP matrix code which is not thread
safe. Therefore this producer can't be a stream module.
Remaining fixes of AK5-->AK4 migration.
Merge pull request #3867 from Dr15Jones/revertCSCSegmentProducerToLegacyModule

Multithreading -- Revert CSCSegmentProducer back to legacy module
Merge pull request #3820 from makortel/tautriggerdqmTauProducer_DQMGenericClient

DQM -- Migrate Tau HLT DQM to DQMGenericClient+DQMEDHarvester
Merge pull request #3866 from Dr15Jones/makeSiStripCusterizerProdsStreamModules

Multithreading -- Make SiStripClusterizer prods stream modules
Add test for ca8PFJetsCHSPruned and fix usage of rParam in jetTools accordingly.
Fix overwriting of existing JetMETcorr modules.
Merge pull request #3818 from thspeer/switchOffClusterShape

Tracking: Switch off cluster shape in step6 seeding
Get at least the CHS right.
Fix clang warnings.
Fix overloaded-virtual warnings.