Fix BCM digitization configuration test

Tadej Novakrequested to merge
tadej/athena:digi/bcm-fix into master

As spotted in !20486 (merged), BCM digitization test is now failing as properties changed. The failure was not present in the original MR !21388 (merged).

Opened ATLASSIM-4049 to avoid this in the future.

/cc @jchapman

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