ext/pymongo instrumentation sets Status description to a dictionary instead of a string

[codeboten]

Describe your environment
Python 3.8.2 Docker container environment

Steps to reproduce

1. setup opentelemetry collector
2. run pymongo example configured to export to opentelemetry collector

What is the expected behavior?
Spans are exported to my opentelemetry collector

What is the actual behavior?
No spans were reported and no error was visible

Additional context
The pymongo instrumentation sets the description argument to a dict here:

opentelemetry-python/ext/opentelemetry-ext-pymongo/src/opentelemetry/ext/pymongo/__init__.py

Line 107 in 090b664

span.set_status(Status(StatusCanonicalCode.OK, event.reply))

This causes the otcollector exporter throws an exception on, which has been addressed in #640