Introduce a new driver pxe-amt to extend Ironic's range to desktops.
AMT (Active Management Technology)/vPro is widely used in desktops
to remotely control the power, similar to IPMI in servers.
It will use AMT as power management and PXE as deploy management.
This patch only provides basic operations to support the workflow of
remotely deploying on AMT/vPro system.
This adds power, management and it's own vendor interface.
This also adds a new fake-amt driver.
Implements blueprint amt-pxe-driver
Change-Id: Idd9b63d124f52e24efab8b49dfe1f2e25b8387e6
f72a694784