Simplify Telemetry return code
Simplify Telemetry return code

Chromium service has trouble with handling return_code larger than 101.
Since there is no use in having return_code reflecting the number of test
failures, we simplify Telemetry return code to:
1 - if the failures are handleable (recorded in telemetry failure results)
2 - if the failure is unhandleable

Bug:chromium:792681
Change-Id: Ide651bba4ce3bded0a35d4b4efa9a707355149cf
Reviewed-on: https://chromium-review.googlesource.com/850745
Reviewed-by: Juan Antonio Navarro Pérez <1649bb5e6b9eafe026580e338065dc64ba6b80b2@chromium.org>
Commit-Queue: Ned Nguyen <8e49e083cfcfb68517585b2e78d68c2fd2b70562@google.com>

catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult