[autotest] List the SAM instances that we have in global_config.ini

We don't currently maintain this list anywhere other than puppet, and
it'd be nice to be able to programmatically access it for both deploy
and monitoring scripts.

BUG=chromium:340454
TEST=None

Change-Id: Ida9141e0165ec1e9c3b212e7386692d120c3d5e0
Reviewed-on: https://chromium-review.googlesource.com/184977
Reviewed-by: Dan Shi <dshi@chromium.org>
Commit-Queue: Alex Miller <milleral@chromium.org>
Tested-by: Alex Miller <milleral@chromium.org>
1 file changed