Authenticate test-runner correctly to the cluster

[irony]

Right now we are skipping TLS verification when communicating with the Kubernetes cluster. This should be changed so we use the (self issued) ca.crt which is available in the /run/secrets/kubernetes folder. I’ve tried many different approaches but haven’t got it working correctly.

This is the error we get from the test runner if we remove the ENV TLS_SKIP_TLS_ in Dockerfile.tests

https://stackoverflow.com/questions/31673587/error-unable-to-verify-the-first-certificate-in-nodejs