Unable to pickle SpanContext

[rickychu]

Describe your environment
Python version: 3.8 or higher

    "telemetry.sdk.language": "python",
    "telemetry.sdk.name": "opentelemetry",
    "telemetry.sdk.version": "0.15b0"

Steps to reproduce

    try:        
        with tracer.start_as_current_span("main") as parent:

            parent_context = parent.get_span_context()
            p = pickle.dumps(parent_context)

            pickle_context = pickle.loads(p)
            assert(parent_context == pickle_context)

    except Exception as e:
        print(e)

What is the expected behavior?
No error

What did you expect to see?
True

What is the actual behavior?
Exception:
new() missing 2 required positional arguments: 'span_id' and 'is_remote'

Additional context
I need a way to pass the context to a multiprocessing function. This error is stopping me from archiving this. No issue on 0.13b0.

[github-actions]

This issue was marked stale due to lack of activity. It will be closed in 30 days.

[srikanthccv]

This can be closed, fixed in #1380.