Disable resolvconf service.

When resolv.conf file is managed by salt, resolvconf service should be disabled
because it overwriting resolv.conf after reboot.

Change-Id: I7ec85872ddbd5f90232d5d41a8171169c779a1c5

linux/network/resolv.sls

   - source: salt://linux/files/resolv.conf
   - mode: 644
   - template: jinja
+  - follow_symlinks: false
+  - require:
+    - service: resolvconf_service
 
-linux_resolvconf_disable:
-  cmd.run:
-  - name: resolvconf --disable-updates
-  - onlyif: resolvconf --updates-are-enabled
+resolvconf_service:
+  service.dead:
+    - name: resolvconf
+    - enable: false
 
 {%- endif %}