Fixed:
   * The udev-rules template is not tested
   * Wrong unicode character in the template leads to udev ignoring
     the rule completely
   * The template is unable to be rendered due to absent import
   * udev is not retrigerred with new rules

Change-Id: I134b5e49b883afcc5e34feaaa561d7ca70192796
Closes-Bug: PROD-16649

Change-Id: If2d31176d28d85c7d13cc44f34f923a821942f46