disables auto updates for flatcar

Author: Brandon Gottesman

builtin/files/userdata/cloud-config-controller

@@ -40,13 +40,10 @@ coreos:
     reboot-strategy: "off"
   units:
 {{if .DisableContainerLinuxAutomaticUpdates}}
-    - name: disable-automatic-update.service
-      command: start
-      content: |
-        [Unit]
-        Description=Disable Container Linux automatic update. Work around to be removed on Ignition migration.
-        [Service]
-        ExecStart=/usr/bin/sh -c 'for u in update-engine locksmithd; do systemctl stop $${u}.service; systemctl mask $${u}.service; systemctl disable $${u}.service; done; systemctl reset-failed'
+    - name: update-engine.service
+      mask: true
+    - name: locksmithd.service
+      mask: true
 {{end}}
 
     - name: handle-disable-request.service

builtin/files/userdata/cloud-config-etcd

@@ -42,13 +42,10 @@ coreos:
     reboot-strategy: "off"
   units:
 {{if .DisableContainerLinuxAutomaticUpdates}}
-    - name: disable-automatic-update.service
-      command: start
-      content: |
-        [Unit]
-        Description=Disable Container Linux automatic update. Work around to be removed on Ignition migration.
-        [Service]
-        ExecStart=/usr/bin/sh -c 'for u in update-engine locksmithd; do systemctl stop $${u}.service; systemctl mask $${u}.service; systemctl disable $${u}.service; done; systemctl reset-failed'
+    - name: update-engine.service
+      mask: true
+    - name: locksmithd.service
+      mask: true
 {{end}}
 {{- range $u := .Etcd.CustomSystemdUnits}}
     - name: {{$u.Name}}

builtin/files/userdata/cloud-config-worker

@@ -42,13 +42,10 @@ coreos:
     reboot-strategy: "off"
   units:
 {{if .DisableContainerLinuxAutomaticUpdates}}
-    - name: disable-automatic-update.service
-      command: start
-      content: |
-        [Unit]
-        Description=Disable Container Linux automatic update. Work around to be removed on Ignition migration.
-        [Service]
-        ExecStart=/usr/bin/sh -c 'for u in update-engine locksmithd; do systemctl stop $${u}.service; systemctl mask $${u}.service; systemctl disable $${u}.service; done; systemctl reset-failed'
+    - name: update-engine.service
+      mask: true
+    - name: locksmithd.service
+      mask: true
 {{end}}
 {{- range $u := .CustomSystemdUnits}}
     - name: {{$u.Name}}