gce: Update Kubernetes to v1.6.6

* Disable locksmithd.service on hosts, the container linux
update operator will be used instead

gce-bootkube-worker/cl/bootkube-worker.yaml.tmpl

@@ -4,12 +4,7 @@ systemd:
     - name: docker.service
       enable: true
     - name: locksmithd.service
-      dropins:
-        - name: 40-etcd-lock.conf
-          contents: |
-            [Service]
-            Environment="REBOOT_STRATEGY=etcd-lock"
-            Environment="LOCKSMITHD_ENDPOINT=http://${k8s_etcd_service_ip}:2379"
+      mask: true
     - name: wait-for-dns.service
       enable: true
       contents: |
@@ -104,7 +99,7 @@ storage:
       contents:
         inline: |
           KUBELET_IMAGE_URL=quay.io/coreos/hyperkube
-          KUBELET_IMAGE_TAG=v1.6.4_coreos.0
+          KUBELET_IMAGE_TAG=v1.6.6_coreos.1
     - path: /etc/sysctl.d/max-user-watches.conf
       filesystem: root
       contents:
@@ -121,7 +116,7 @@ storage:
             --trust-keys-from-https \
             --volume config,kind=host,source=/etc/kubernetes \
             --mount volume=config,target=/etc/kubernetes \
-            quay.io/coreos/hyperkube:v1.6.4_coreos.0 \
+            quay.io/coreos/hyperkube:v1.6.6_coreos.1 \
             --net=host \
             --dns=host \
             --exec=/kubectl -- --kubeconfig=/etc/kubernetes/kubeconfig delete node $(hostname)