Adding BatchSpanProcessor thread name

[benjaminsky]

Description

Adding a name to the BatchSpanProcessor worker thread. This helps with debugging since this worker thread currently needs to live in the same process as the instrumented code.

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

This is covered by existing tests.

Does This PR Require a Contrib Repo Change?

• No.

Checklist:

• Followed the style guidelines of this project
• Changelogs have been updated
• Unit tests have been added
• Documentation has been updated

[benjaminsky]

docker-test failed due to localhost:27017: [Errno 104] Connection reset by peer when connecting to mysql locally. This appears to be an intermittent failure. Is it possible to rerun this check?

[ocelotl]

docker-test failed due to localhost:27017: [Errno 104] Connection reset by peer when connecting to mysql locally. This appears to be an intermittent failure. Is it possible to rerun this check?

Rerunning...