validation of the New ITk Seed Maker: first fixes

Charline Rougierrequested to merge
crougier/athena:SeedMakerValidation into 21.9

Validation of the New ITk Seed Maker in r21.9.

Context: https://its.cern.ch/jira/browse/ATLIDTRKCP-337

Edited by Louis-Guillaume Gagnon

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