Add database and external span attributes to correlate to metric data (Duplicate)

[obenkenobi]

This is a duplicate of the following PR.

Overview

This adds attributes to Spans so that we can correlate aggregate database and external metric back to their related client spans.

• db.system
• db.operation
• db.collection
• server.address
• server.port

https://opentelemetry.io/docs/specs/otel/trace/semantic_conventions/http/
https://opentelemetry.io/docs/specs/otel/trace/semantic_conventions/database/

Related Github Issue

Include a link to the related GitHub issue, if applicable

Testing

I added unit tests to cover the new attributes. I can a couple of local apps with a local build and verified that the attributes were correctly added.

Checks

[ X ] Are your contributions backwards compatible with relevant frameworks and APIs?
[ ] Does your code contain any breaking changes? Please describe.
[ ] Does your code introduce any new dependencies? Please describe.

[sdaubin]

@obenkenobi @jtduffy will this be merged soon? Do you need help with anything?

[meiao]

Fixes #1478

[jtduffy]

@sdaubin Sorry for the delay.
There are failing unit tests in com.newrelic.agent.tracers.DefaultSqlTracerTest:

• testSpanEventDatastoreTruncationAtExactLimit
• testSpanEventDatastoreTruncation
• testSpanEventDatastore