Replace incomplete "ilo" driver with pxe_ilo and fake_ilo

The "ilo" driver is not complete -- it only has a PowerInterface today.

This patch removes it from setup.cfg, deletes the drivers/ilo.py module,
and adds both PXEAndIloDriver and FakeIloDriver instead.

Change-Id: I431fd5155d0696a0a48ad8decf9f5317c5fcd7a2
Merge "Replace incomplete "ilo" driver with pxe_ilo and fake_ilo"