Fix offense reported by vet. Add vet to 'code style` job.

Merged Tomasz Maczukin requested to merge fix/executor-kubernetes-test-vet-offense into master

What does this MR do?

Fixes an offense reported by vet in executors/kubernetes/executor_kubertnetes_test.go.

Why was this MR needed?

Are there points in the code the reviewer needs to double check?

Does this MR meet the acceptance criteria?

  • Documentation created/updated
  • Tests
    • Added for this feature/bug
    • All builds are passing
  • Branch has no merge conflicts with master (if you do - rebase it please)

What are the relevant issue numbers?