Remove complex autotest common code.

So the autotest imports make it really hard to install fake_device_server
as a standalone server. This CL removes that and just requires that the
Python code be installed in a directory called fake_device_server since
we have no Autotest dependencies.

BUG=chromium:361204
TEST=Started server + ran all unittests.

Change-Id: Iefcb5105cb96f07a99c919a1d3d41bf5ff3cb46f
Reviewed-on: https://chromium-review.googlesource.com/195454
Tested-by: Chris Sosa <sosa@chromium.org>
Reviewed-by: Alex Vakulenko <avakulenko@chromium.org>
Commit-Queue: Chris Sosa <sosa@chromium.org>
13 files changed