InDetTrackPRD_Association: Use ReadHandleKeyArray,
One of the last missing VarHandles. Use ReadHandleKeyArray in InDetTrackPRD_Association.
At the same time drop problematic dumping and non-const member variables. If InDet experts think that the dumping functionality is useful, feel free to re-instate it in a atheanMT-compliant way.
Aside: This Alg does nothing than calling the InDetPRD_AssociationToolGangedPixels, which at this point is a non-const global AlgTool.
I suspect the proper solution would be to merge the AlgTool InDetPRD_AssociationToolGangedPixels and the Algorithm InDetTrackPRD_Association into one algorithm and and use only one instance of this algo processing all track collection in one go.
Tagging @goetz who knows this code much better than me.