OpenTelemetry Part 3: v0.6.0 gems and VMPooler

For part three of my journey in using OpenTelemetry (Otel) with Sinatra I am upgrading to the 0.6.0 release of the OTel gems to get many new features, adding instrumentation to VMPooler, and learning what not to do. Part 3 also includes opening several issues and making my first code contribution to opentelemetry-ruby. Lastly, I will be sharing some more complete code examples showing how all the bits are configured.