Add SpanData.Builder to allow modifying the information in a SpanData…#1502

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anuraaga wants to merge 2 commits intoopen-telemetry:masterfrom anuraaga:spandata-tobuilder

+522-422

Commits on Aug 4, 2020

Add SpanData.Builder to allow modifying the information in a SpanData, for example in an Exporter.
Anuraag Agrawal
committed
Don't depend on testing-internal automatically since some modules should include the SDK.
Anuraag Agrawal
committed