IMDS service client

[L-Applin]

Finish the IMDS (instance metadata) service client and refactor some of its code.

Motivation and Context

The IMDS client needs to be coded manually.

Modifications

Main changes are improvement to the control flow of DefaultEc2Metadata and EndpointProvider. Some refactoring of test cases was done.

Testing

Unit tests were there and were updated with this PR.

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

[L-Applin]

SonarCloud Quality Gate failed.   

2 Bugs 0 Vulnerabilities 2 Security Hotspots 34 Code Smells

65.3% Coverage 1.3% Duplication

The two security Hotspot should be safe, as the ip adresses are already publicly available: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-retrieval.html

[sonarqubecloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
68 Code Smells

64.4% Coverage
0.9% Duplication