TraceTest failing

[julianocosta89]

After this PR got merged #1385, the TraceTests are failing due to changes on the semantic conventions.

messaging.destination.kind="topic" is not part of span attributes anymore, but when removing it, we can't get an unique selector.

https://github.com/open-telemetry/opentelemetry-demo/blob/main/test/tracetesting/checkout-service/place-order.yaml#L48
and
https://github.com/open-telemetry/opentelemetry-demo/blob/main/test/tracetesting/frontend-service/06-checking-out-cart.yaml#L62

have the same identifiers.

I've pinged the TraceTest team in order to get some assistance.