Move LED testing keywords to the library

Move the keywords from tests/test_led.robot to lib/utils.robot.

Resolves  openbmc/openbmc-test-automation#1245
Change-Id: I08de681db9c5e506370003331fef0570a1938abf
Signed-off-by: Steven Sombar <ssombar@us.ibm.com>
2 files changed