Tracking getByToken migration, part 1 (RecoTracker/CkfPattern and RecoTracker/DebugTools)

Migration also of CkfPattern, on top of 555
Notes:
 - the data access through the MeasurementTracker is not yet migrated (requires a major redesign of the MT class)
 - some non-production code in DebugTools has not been migrated, will do later