Set span-kind field in trace_proto.go (#180)
Set span-kind field in trace_proto.go (#180)

* Set span-kind field in trace_proto.go

* Update exporter/trace/trace_proto.go

Co-authored-by: Ali Josie <05a94cd082e6ab88953d8554a9b7151ee3894ffe@users.noreply.github.com>

* Remove loggging call. Library code shouldn't log as it is hard for
applications to disable.

Co-authored-by: Ali Josie <05a94cd082e6ab88953d8554a9b7151ee3894ffe@users.noreply.github.com>
GoogleCloudPlatform/opentelemetry-operations-go,GoogleCloudPlatform/opentelemetry-operations-go