Bridge Baggage

[anuraaga]

We currently do not bridge the correlationscontext package at all. This means if application code uses the package, it won't function correctly. In particular, the OpenTracing shim uses it when propagating.

https://github.com/open-telemetry/opentelemetry-java/tree/master/api/src/main/java/io/opentelemetry/correlationcontext