Add support for self-signed certificates

[kwilsonmg]

Summary

The one connect python SDK does not currently allow for self-signed certificates to be authenticated when creating a new client, these will always fail.

Use cases

Self-signed certificates are inexpensive (free) and suitable for use in non-public facing applications.

Proposed solution

Supporting optional self-signed certificates through minor modifications to client.py.

Is there a workaround to accomplish this today?

Not using python.

References & Prior Work

• Support ticket SNI-93316-467
• HTTPX verify documentation

[kwilsonmg]

I have a PR incoming implementing this.