Preserve original error messages in OTLP exporter (#2459)
Preserve original error messages in OTLP exporter (#2459)


open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector-contrib,open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector-contrib