Add an API example base and functional test base

Add examples/common.py, which is a basic common setup that mimics OSC's
configuration options and logging without the rest of the CLI.

Also add the functional test tooling for examples to prevent bit rot.

Co-Authored-By: Dean Troyer <dtroyer@gmail.com>
Change-Id: Ie92b675eafd93482ddc9a8ce0b0588e23ed50c35
Merge "Add an API example base and functional test base"