Currently, the hadoop-aws module only runs Surefire if AWS credentials have been configured. This implies that all tests must run integrated with the AWS back-end. It also means that no tests run as part of ASF pre-commit. This issue proposes for the hadoop-aws module to support running isolated unit tests without integrating with AWS. This will benefit S3Guard, because we expect the need for isolated mock-based testing to simulate eventual consistency behavior. It also benefits hadoop-aws in general by allowing pre-commit to do something more valuable.