Add tracing of the kubernetes cluster during testing (#608)

* Add tracing of the kubernetes cluster during testing

This adds tracing to the testing to get the kubelet's logs upon
failure. In addition, it keeps track of the pods, and the node
statuses throughout the test.

* Add arguments to make virtual kubelet's log more useful

hack/skaffold/virtual-kubelet/pod.yml

@@ -16,6 +16,13 @@ spec:
     - mock
     - --provider-config
     - /vkubelet-mock-0-cfg.json
+    - --startup-timeout
+    - 10s
+    - --klog.v
+    - "2"
+    - --klog.logtostderr
+    - --log-level
+    - debug
     ports:
     - name: metrics
       containerPort: 10255