Return on the first successful upload.
Return on the first successful upload.

Right now, this always errors out after successfully uploading
as it'll upload twice. Once with reviewers and once without.
This fixes that.

BUG=None
TEST=Ran it + pylint.

Change-Id: Iebaeedc8a667503ddee754e7a386de7c4d7143b2
Reviewed-on: https://gerrit.chromium.org/gerrit/45525
Tested-by: Chris Sosa <959d3d631fb6f17f1b07f751372041a1edb210d1@chromium.org>
Reviewed-by: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>
Commit-Queue: Chris Sosa <959d3d631fb6f17f1b07f751372041a1edb210d1@chromium.org>

bpsinc-native/src_third_party_chromite,chadversary/chromiumos.chromite,chadversary/chromiumos.chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite