Add debugging info during Zipkin export
Recently ran into an issue trying to integrate Zipkin and used this to help identify the issue.
After

The committers are authorized under a signed CLA.
- :white_check_mark: Andrew Hood (8977842fb488dc978c8f1e247c55a56b4576a602)
Thanks for the context, I haven't looked at the OTLP exporter but I will. I think logging for non success is the right way to go I've updated the PR.
Feedback addressed, thanks for the review!
@andrewhood125 (rubocop complaining about rubocop things)
@ericmustin I believe this is ready to go now!
@andrewhood125 yup, lgtm and i've approved, cc @open-telemetry/ruby-maintainers