Tracking getByToken migration, part 0.2 (RecoTracker/TrackProducer and minimal dependencies)

This is on top of pull request 552 (i.e. it includes it)

Besides RecoTracker/TrackProducer I need to change also two files in RecoEgamma/EgammaPhotonProducers and Alignment/KalmanAlignmentAlgorithm.
 - In RecoEgamma/EgammaPhotonProducers, I did only the change required by the InputTag -> EDGetToken change in the TrackProducer, I didn't clean up the other getByLabels in that file
 - In Alignment/KalmanAlignmentAlgorithm I just commented out the initialization of the InputTag since it seems it's never used (apparently the edm::Event is never accessed !?)