Automation fix for ifconfig command
Automation fix for ifconfig command

changes:
   - ifconfig error message:
     Command 'ifconfig' returned non-zero exit status 127
   - command changed to /sbin/ifconfig

Change-Id: I123c86ba2a444c0286b10aa15cbf1c3b1a2597a5
Signed-off-by: Sushil Singh <7ecc3fd6a48952d1cd7b43fd00a1f6bd3c8c3306@in.ibm.com>

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation