…using single instance

Motivation and Context

Fix #5881

Currently, if credentials provider is not provided in AWS CRT-based S3 client, DefaultCredentialsProvider will be created by DefaultCredentialsProvider.create(). However, it returns a singleton instance. This means that if a customers is creating and closing a new client per request, the singleton instance may get closed and all subsequent requests would fail, causing Connection pool shut down to be thrown

Modifications

Use DefaultCredentialsProvider.builder().build() (new instance) instead of DefaultCredentialsProvider.create() (singleton) to initialize credentials provider if it's not provided.

Testing

Added unit tests

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Checklist

• I have read the CONTRIBUTING document
• Local run of mvn install succeeds
• My code follows the code style of this project
• My change requires a change to the Javadoc documentation
• I have updated the Javadoc documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed
• I have added a changelog entry. Adding a new entry must be accomplished by running the scripts/new-change script and following the instructions. Commit the new file created by the script in .changes/next-release with your changes.
• My change is to implement 1.11 parity feature and I have updated LaunchChangelog

License

• I confirm that this pull request can be released under the Apache 2 license