[#286] Add a missing agent config

[marko-bekhta]

based on https://eclipse-cbi.github.io/cbi-website/jenkins-pipeline-library-sample/index.html#define-the-agent ?

[pzygielo]

Why not agent any instead of whole this change?

[marko-bekhta]

I'm just trying to follow the example from the link in the description.
Do you know of any working examples that I can take a look at?

(I wonder whether we need that pipeline library here at all or if I should just go with agent any/agent basic and remove the pipeline library ... that was going to be my next "test" 😃 (https://eclipse-cbi.github.io/cbi-website/jiro-agent/index.html) )