[autotest] In run_suite, don't flag tests with status TEST_NA.

With this change, tests that end with status TEST_NA will no longer
be listed with failures on the buildbot waterfall.  The intent is to
reduce noise and confusion for sheriffs who must decide what tests
need triage and action.

BUG=chromium:278338
TEST=run_suite for dummy suite with a local image

Change-Id: I791d3736599fc1f137d6afe7fc66f9d271e40d7d
Reviewed-on: https://gerrit.chromium.org/gerrit/66733
Commit-Queue: Richard Barnette <jrbarnette@chromium.org>
Tested-by: Richard Barnette <jrbarnette@chromium.org>
Reviewed-by: Richard Barnette <jrbarnette@chromium.org>
1 file changed