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Prevent CSC strip phi-ordering work-around being used for MC Overlay

John Derek Chapman requested to merge jchapman/athena:CscOverlayPatches_master into master

The CSC endcaps were modelled with a simple z translation in GeoModel, whereas in data they were built the same i.e. rotated in z. This means that the phi-ordering of the CSC phi strips in A-wheel needs to be flipped to make data and MC strip numbering consistent. This should only happen for data overlay though, so this commit adds a fix to prevent the flip being applied for MC+MC overlay.

Edited by John Derek Chapman

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