Add test support for PCI-E devices

[michaelasp]

Currently all the tests we have run with dummy linux devices. This is good but does not test the PCI-E logic, such as reading hardware address and other such logic. Some ideas are to emulate a PCI device and make it so we can configure it with a dummy driver. However we do it, we should make it so the device can configure its name, hardware address and other parts that DRANet directly accesses.

[michaelasp]

I'll probably work on this in the coming months but if someone wants to pick this up before I assign myself they are more than welcome to.