List handler time out issue

[yueny2020]

I implemented the list handler for resource AWS::CodeGuruReviewer::RepositoryAssociation. Our service uses DynamoDB and the list handler will call the api as long as the nextToken is not null.

In our prod account, as the canary test, the amount of data is large and caused the registration verification test failed.

In contract test, can we check whether the resource has found, if found, no list call anymore?