lamp test: Add vritual lamp test function

- This feature adds the functionality that enables force updating
  certain physical LEDs and skip updating certain physical LEDs as
  part of lamp test.

- This is a generic feature that gives more control over handing
  physical LEDs.

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: I6f06ed103b1ceefdaa774b7a74a4a392609000ed
4 files changed