update validate-cluster.sh

cluster/validate-cluster.sh

@@ -40,9 +40,9 @@ while true; do
   # Suppress errors from kubectl output because during cluster bootstrapping
   # for clusters where the master node is registered, the apiserver will become
   # available and then get restarted as the kubelet configures the docker bridge.
-  nodes=$("${KUBE_ROOT}/cluster/kubectl.sh" get nodes) || true
-  found=$(($(echo "${nodes}" | wc -l) - 1)) || true
-  ready=$(echo "${nodes}" | grep -c "Ready") || true
+  node=$("${KUBE_ROOT}/cluster/kubectl.sh" get nodes) || true
+  found=$(($(echo "${node}" | wc -l) - 1)) || true
+  ready=$(echo "${node}" | grep -c "Ready") || true
 
   if (( "${found}" == "${EXPECTED_NUM_NODES}" )) && (( "${ready}" == "${EXPECTED_NUM_NODES}")); then
     break