Determine why IT is failing when using Pulsar `4.0.2`

[onobc]

Summary

The DefaultTenantAndNamespaceTests reactive IT is failing when running against Pulsar server 4.0.2.

Determine why and re-enable once accounted for.

Details

This IT sets the default tenant and namespace for Spring Pulsar to use and sends 10 message and expects to consume 10 messages:

If the Pulsar container image is < 4.0.2 everything is fine.
However, when set to 4.0.2 it fails to consume some of the messages (reactive client only).

Failed run: https://github.com/spring-projects/spring-pulsar/actions/runs/12892190231/job/35945871536#step:5:973