The test verifies that kubelet deletes the pods/containers within a reasonable
time. It queries the kubelet /runningpods endpoint to retrieve a list of
running pods directly. The outline of the test is:

 - Create an RC
 - Wait until all pods are running (based on the pod status)
 - Verify pods are running by querying the /runningpods
 - Delete the RC
 - Check all pods are deleted by querying /runningpods