Customize function to provide a minimal configuration for profiling (#…

…106)

Can be included with the following snippet in the configuration:

    from RecoPixelVertexing.Configuration.customizePixelTracksForProfiling import customizePixelTracksForProfiling
    process = customizePixelTracksForProfiling(process)

Removes validation, DQM, and output modules.
As suggested in #70 (comment), an `AsciiOutputModule` is used to require the `pixelTracks`.

RecoPixelVertexing/Configuration/python/customizePixelTracksForProfiling.py

@@ -7,7 +7,7 @@ def customizePixelTracksForProfiling(process):
         ),
         verbosity = cms.untracked.uint32(0),
     )
-
+    
     process.outPath = cms.EndPath(process.out)
 
     process.schedule = cms.Schedule(process.raw2digi_step, process.reconstruction_step, process.outPath)