- Use new Gaudi helper class to iterate recursively through all child tools and using the new
  Gaudi visitor which renounces certain inputs from a tool, to renounce the output cluster splitting
  probability map from all child tools. The map is recorded to StoreGate before any of the child tools
  are called. Thus, the map, although not final yet, can already be used through read handles. Without
  renouncing the inputs, Gaudi would issue a circular dependency warning.
- Remove the previously introduced property which allowed to renounce manually the input cluster
  splitting probability map from the PixelClusterOnTrackTool.

Allow the PixelClusterOnTrackTool to renounce the input cluster splitting probability map.
This is used to suppress implicit circular dependency warnings when the PixelClusterOnTrackTool
is used indirectly by the ambiguity resolver where the ambiguity resolver produces the cluster
splitting probability map which is read by the PixelClusterOnTrackTool.

Originally the cluster splitting probabilities were stored in a reserved word of the
corresponding PixelClusters. This however required to update a collection already stored
in StoreGate i.e. was not thread-safe.

Now the splitting probabilities are stored in separate maps, which are copied and updated
when passed from algorithm to algorithm. The algorithms record the map at the very beginning
to allow their tools (PixelClusterOnTrackTool) to access the map via read handles rather than
passing the map down the call chain explicitly.

Goetz Gaycken authored 5 years ago and Walter Lampl committed 5 years ago

- Use a PRD-to-track map rather than the PRD_AssociationTool which conains a PRD-to-track map
  internally. This is needed to resolve ATLASRECTS-5005.
- Made all methods const.
- The score processor does not create track copies anymore, thus PRD-to-track maps stay valid for
  scored tracks.
- The ambiguity processors now use a helper class which manages the new and original tracks i.e.
  tracks with mixed ownership, and creates track copies only for the final track collection if
  necessary.
- Moved debug ntuple code of simple ambiguity processor to a new derived class, to improve the
  readability.

- provide methods to create fitters with all its tools which use customized pixel cluster
on track tools with configurable split cluster maps, and
- use these methods to create fitters for extended track collections, which require
different split cluster maps.

This fixes q223, which requires a special split cluster map for pixel tracks.

2016-01-25 Alex Alonso
	* Fix for TrkAmbiguityProcessor after latest changes.
	* Tagging as: InDetRecExample-03-01-05-05

2016-01-23 Alex Alonso
	* Add new config flags to use different various track fitter until one creates valid
	covariance matrices. See ATLASRECTS-3555
        * Migrate the Rel 20.7 changes for low Pt to rel 21. Requires
	TrkAmbiguityProcessor-01-00-14-02
	* Tagging as: InDetRecExample-03-01-05-04

2016-01-10 Goetz Gaycken
	* Reverted removal of cut level 13, but now cut level 13
	  will only activate calo seed TRT segment finding if the
	  calorimeter is available.
2016-12-16 Alex Alonso
	* OBO Alex Kastanas. Fix the configuration for Global Monitoring
	accordligy to new tag: InDetGlobalMonitoring-00-10-01
	* Tagging as InDetRecExample-03-01-04
	* Tagging as InDetRecExample-03-01-03
...
(Long ChangeLog diff - truncated)


Former-commit-id: e3a159c8