tree e963aaa89827c0afc1c3c1cf409b5154cd54267e
parent d19df255c75ed3df986b2e41ca2bc4a6ba88941c
author Lei YU <mine260309@gmail.com> 1572253400 +0800
committer Lei YU <mine260309@gmail.com> 1572922965 +0000

power-utils: Initially add Updater class

The Updater class is used to do PSU code update, initially add it that
does unbind/bind driver and set PSU present to false/true during the
update.

Tested: Manually verify on Witherspoon that the driver is unbind/bind,
        and the PSU present property is set to false/true during the PSU
        update:
          psutils --update \
          /xyz/openbmc_project/inventory/system/chassis/motherboard/powersupply0 \
          /tmp/images/xxxxxxxx

Signed-off-by: Lei YU <mine260309@gmail.com>
Change-Id: Ic0a9df7687303caeb9a7f21ba00dc33ee76482db