Treat errors as fatal in BinhostTest.

Currently we skip over errors in some places in BinhostTest. This leads
to more errors later if we try to fetch the compat id. Treat these
errors as fatal so that we can get debugging information.

Example failure that this will help debug:

http://chromegw/i/chromiumos.tryserver/builders/binhost-pre-cq/builds/79

BUG=chromium:443254
TEST=Run the test.

Change-Id: If3571a4543768971799de1cd63d3f80dd2d728fe
Reviewed-on: https://chromium-review.googlesource.com/262463
Reviewed-by: David James <davidjames@chromium.org>
Commit-Queue: David James <davidjames@chromium.org>
Tested-by: David James <davidjames@chromium.org>
2 files changed