Automation enhancement for firmware update
Automation enhancement for firmware update

changes:
   - Removed code to replace the image with least priority.
   - New implementation will delete the alternate side image
     and then delete the the image, once image gets deleted
     a fresh image installation will be occur.
   - todo: use redfish URI to boot the image from alternate side.

Change-Id: I3dfe2909eda773cc0cd8bd4f95f10305bbe749c0
Signed-off-by: Sushil Singh <7ecc3fd6a48952d1cd7b43fd00a1f6bd3c8c3306@in.ibm.com>

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