Test system leds of Witherspoon system.

This change includes:
   - Added test cases to turn on/off power and fault LEDs.
   - Added NA system LED test cases in skip lists.

Resolves openbmc/openbmc-test-automation#529

Change-Id: I8bc8e945d9cb76bd6495775110517c2a49ab8803
Signed-off-by: Rahul Maheshwari <rahulmaheshwari@in.ibm.com>
4 files changed