This patch introduces soft power off support to Ironic virt driver.
Change-Id: Ie81d5c6e7f12cc5371ca3475daab09aa7d92d645
Implements: blueprint soft-reboot-poweroff
Co-Authored-By: Tang Chen <chen.tang@easystack.cn>
Co-Authored-By: xiexs <xiexs@cn.fujitsu.com>