Check Fault LED in health check
Check Fault LED in health check

It is possible for fault LED to be lit without
any active events.  Have this trigger a critical,
since we have no idea what would have caused the light.

Change-Id: Id4cbbc64b0dd44c2757ce1f30deaa28a7e668472

openstack/pyghmi,stackforge/pyghmi,openstack/pyghmi