Perform retries in APIClient when encountering EventualConsistency errors

[zpatrick]

What does this pull request do? This adds retry logic to the client package whenever the EventualConsistencyError code is encountered. In that scenario, the request is retried up to 3 times.

How should this be tested? Unit Tests

Checklist

• [x] Unit tests
• ~[ ] Smoke tests (if applicable)~
• ~[ ] System tests (if applicable)~
• ~[ ] Documentation (if applicable)~

closes #585