Move keywords to lib/utils.robot

This commit moves keywords in update_mac.robot to lib/utils.robot.
These keywords can be now reused in other scripts where this
functionality is needed.

Change-Id: I0d34aab12aa69242ed022eb73aa1eea5ce61bab6
Signed-off-by: Sunil M <sunilmam@us.ibm.com>
2 files changed