Fixed boot devices test cases.

This change includes:
    - Corrected boot device path.
    - Replaced power on with off.

Resolves openbmc/openbmc-test-automation#1004

Change-Id: I77dbf87d616775e99a67a27d3b4c94874e1a89c5
Signed-off-by: Rahul Maheshwari <rahulmaheshwari@in.ibm.com>
1 file changed