Implement ohai-solo data plane discovery module

This is a prototype of a discovery module that
connects to a server and gathers information about
how it is configured.

Change-Id: Ide2d75769ae21befcab6886b9cfd12b7ef19ea8d
Allow running satori on localhost

Still needs style, unittests, and a no-regression promise.

Change-Id: Ia6bf6f5d1e4bcadb414eb79bb9673fbc60d1c9a6
Implements: blueprint satori-localhost