Replace OpenCensus with OpenTelemetry

**Is your feature request related to a problem? Please describe.**
Difficult to bridge between OpenCensus, OpenTracing and OpenTelemetry. As OpenTelemetry is has superseded OpenCensus and OpenTracing, leverage that to reduce the complexity.

**Describe the solution you'd like**
OpenCensus functionality dropped for OpenTelemetry.

**Describe alternatives you've considered**
N/A

**Additional context**
N/A