Add the ability to create empty VM and then boot it via PXE. for OpenStack Compute (nova)

Use case: We want to test OS installer like anaconda or debian-installer or any other installer which is able to install OS via network. In order to test it we need to create two-node environment. On the first node we will install tftp and http servers. Then we call neutron API to set all necessary DHCP options. Th...