Testing this file with python fails with
```
Traceback (most recent call last):
  File "RecoPixelVertexing/PixelLowPtUtilities/python/secondStep_cff.py", line 63, in <module>
    secondMeasurementTracker.pixelClusterProducer = 'secondClusters'
TypeError: pixelClusterProducer does not already exist, so it can only be set to a CMS python configuration type
```
The error gives the impression that this file has not been updated in some migration (MeasurementTrackerEvent?). Should it be fixed, or is this an indication that the file is obsolete (and could be removed)?

There are also other files failing for the same reason, list of the ones I encountered is below
```
RecoParticleFlow/PFTracking/python/convBrem_cff.py
RecoPixelVertexing/PixelLowPtUtilities/python/secondStep_cff.py
RecoPixelVertexing/PixelLowPtUtilities/python/thirdStep_cff.py
RecoTracker/ConversionSeedGenerators/python/PhotonConversionTrajectorySeedProducerFromQuadruplets_cff.py
RecoTracker/ConversionSeedGenerators/python/PhotonConversionTrajectorySeedProducerFromSingleLeg_cff.py
RecoTracker/ConversionSeedGenerators/python/PhotonConversionTrajectorySeedProducerFromSingleLeg_gsf_cff.py
RecoTracker/IterativeTracking/python/LargeD0_PixelPairStep_cff.py
RecoTracker/IterativeTracking/python/LargeD0_PixelTibTidTecStep_cff.py
RecoTracker/IterativeTracking/python/LargeD0_PixelTripletStep_cff.py
RecoTracker/IterativeTracking/python/LargeD0_TibTidTecStep_cff.py
RecoTracker/IterativeTracking/python/LargeD0_TobTecStep_cff.py
```