Implement track observer tool

Event/xAOD/xAODTracking/xAODTracking/TrackingPrimitives.h

Event/xAOD/xAODTrackingCnv/CMakeLists.txt

.../xAODTrackingCnv/src/RecTrackParticleContainerCnvTool.cxx

...OD/xAODTrackingCnv/src/RecTrackParticleContainerCnvTool.h

Event/xAOD/xAODTrackingCnv/src/TrackCollectionCnvTool.cxx

Event/xAOD/xAODTrackingCnv/src/TrackCollectionCnvTool.h

Event/xAOD/xAODTrackingCnv/src/TrackParticleCnvAlg.cxx

Event/xAOD/xAODTrackingCnv/src/TrackParticleCnvAlg.h

...ngCnv/xAODTrackingCnv/IRecTrackParticleContainerCnvTool.h

...xAODTrackingCnv/xAODTrackingCnv/ITrackCollectionCnvTool.h

...InDetExample/InDetRecExample/python/InDetJobProperties.py

...Detector/InDetExample/InDetRecExample/python/InDetKeys.py

...tor/InDetExample/InDetRecExample/python/TrackingCommon.py

...e/InDetRecExample/share/ConfiguredNewTrackingSiPattern.py

...etRecExample/share/ConfiguredxAODTrackParticleCreation.py

...or/InDetExample/InDetRecExample/share/InDetxAODCreator.py

...ector/InDetExample/InDetRecExample/share/WriteInDetAOD.py

...ector/InDetExample/InDetRecExample/share/WriteInDetESD.py

.../InDetRecTools/InDetAmbiTrackSelectionTool/CMakeLists.txt

...InDetAmbiTrackSelectionTool/InDetAmbiTrackSelectionTool.h