Add default bearer signer and stubs for other signers

[haydenbaker]

Motivation and Context

• See below

Modifications

• Add a default implementation of the BearerHttpSigner and tests
• Add stubs for all signer default implementations
• Fix up signer interface definitions to include identity (needed after update to HttpSigner interface)
• Fix up POMs to address some small nits

Testing

Screenshots (if appropriate)

N/A

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

[sonarqubecloud]

SonarCloud Quality Gate failed.   

4 Bugs
0 Vulnerabilities
0 Security Hotspots
122 Code Smells

61.5% Coverage
1.1% Duplication