gsutil_util: Don't retry when an object does not exist

When running with --production flag, devsever retries every request up
to 5 times. This CL fixes the error code to make sure we don't retry
on a valid error (i.e., the object does not exist).

BUG=chromium:434168
TEST=Ran a local devserver with --production

Change-Id: Iedb9a9148bc252ea4aa755976eb424e31c76d3ec
Reviewed-on: https://chromium-review.googlesource.com/230512
Tested-by: Yu-Ju Hong <yjhong@chromium.org>
Reviewed-by: Prashanth B <beeps@chromium.org>
Commit-Queue: Yu-Ju Hong <yjhong@chromium.org>
1 file changed