Fix the FTF configuration and enable FTF ZFinder based beamspot tracking

Mark Sutton requested to merge sutt/athena:big-noncense into master

In the makeInDetAlgs() an additional flag is allowed for allow different track collections to be created rather than just that as specified by the requsted signature.

This extra flag always needed to be prefixed with an underscore. This moves the underscore into the python function itself.

In addition, the BeamSpot chain was configured to use the Bjet vertex tracking FS instance of the FTF rather than the ZFinder seeded BeamSpot instance.

These changes fix this, to run the BeamSpot instance, and also set up the ZFinder to use pixel barrel triplets only to increase the performance in terms of speed, efficiency and purity.

Fixes ATR-21293

Edited by Mark Sutton

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