Modify unit testing of cmd/options 1. Why is this change necessary ?    Modify unit testing of options in such a way that we specify the WantedNodeName
Modify unit testing of cmd/options
1. Why is this change necessary ?
   Modify unit testing of options in such a way that we specify
the WantedNodeName

2. How to verify this change ?
   Run, make test

Signed-off-by: gkGaneshR <3ffdcdce3be7a2573e21b866f581857db5c37d6e@gmail.com>

kubernetes/node-problem-detector,kubernetes/node-problem-detector