[Communication] - Simplify identifier json models

[sacheu]

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[sacheu]

/azp run python - communication - tests

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Azure Pipelines successfully started running 1 pipeline(s).

[beltr0n]

(not related to your fixes)
is there a reason this uses unittest instead of pytest?

[sacheu]

I don't know why we use unittest instead of pytest. I need to look into this.