Quarkus: Create an integration test for kafka reactive messaging extension

[loicmathieu]

Description
Create an integration test for kafka reactive messaging extension.

Implementation ideas
The same integration test that for AMQP reactive messaging can be created.

[quarkusbot]

/cc @cescoffier, @kenfinnigan, @phillip-kruger

[geoandri]

I 'd like to give it a try, if someone else hasn't started working on this.

[loicmathieu]

@geoandri feel free to work on it, I'll assign it to you.
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