Test enclosure fault led after assertion on CPU LED.

This change includes:
   - Added test case to verify enclosure fault LED on assertion.
   - Moved "Get System LED State" keyword from led.robot into utils.robot.
   - Added the test case in skip list of barrelye and palmetto as it is NA.

Resolves openbmc/openbmc-test-automation#432

Change-Id: Ic57b488a2087e18fd5e690d800ab4ac2e08eac2b
Signed-off-by: Sweta Potthuri <spotthur@in.ibm.com>
5 files changed