Update PixelCabling to run without an input file, needed for HLT
Fix for ATLASRECTS-5032. Since I'm not a pixel s/w expert, I don't know if this is more is needed but it's roughly what was there in 21.1 (as discussed on the ticket) and we need this in the HLT to move forwards.
I don't see why this changes references but that needs a separate solution.
Cheers,
Stewart