Description of Drivers Ticket:

This work has been spun off from DRIVERS-640.

Reduce race conditions in SDAM error handling. In summary, drivers will update their SDAM and error handling logic to:

• Add topologyVersion field to ServerDescription.
• Ignore stale errors based on generation number and topologyVersion.
• Add SDAM spec tests for topologyVersion comparison.

Spec PR: https://github.com/mongodb/specifications/pull/781

Spec commit:
Author:

{'name': 'Shane Harvey', 'email': 'shane.harvey@mongodb.com', 'username': 'ShaneHarvey'}

Message: SPEC-1663 Reduce race conditions in SDAM error handling (#781)

Add topologyVersion field to ServerDescription.
Add SDAM spec tests for topologyVersion comparison.
Clients ignore stale errors based on generation number and topologyVersion.
Branch: master
https://github.com/mongodb/specifications/commit/7dd9c008be6edaf65368787d5e91c2ac3aeb95b8
See DRIVERS-1187 for updated details.