Only up/down kubeadm clusters for testing.

jobs/ci-kubernetes-e2e-kubeadm-gce.sh

@@ -35,7 +35,11 @@ export GINKGO_TEST_ARGS="--ginkgo.focus=\[Conformance\]"
 
 # Assume we're upping, testing, and downing a cluster
 export E2E_UP="${E2E_UP:-true}"
-export E2E_TEST="${E2E_TEST:-true}"
+# TODO(pipejakob): Reenable testing when we have a pod network that works with
+#     kubeadm 1.6 clusters. For now, simply bringing up a cluster is a good e2e
+#     test, since it will only succeed if the apiserver is healthy and all
+#     expected nodes are registered.
+export E2E_TEST="${E2E_TEST:-false}"
 export E2E_DOWN="${E2E_DOWN:-true}"
 
 # Skip gcloud update checking