Add support for AWS CodeBuild

[joschi]

Context

Add support for fetching build information on AWS CodeBuild.

The available environment variables in the AWS CodeBuild build environment are listed at Environment variables in build environments.

Contributor Checklist

• Added relevant integration or unit tests to verify the changes
• Update the Readme or any other documentation (including relevant Javadoc)
• Ensured that tests pass locally: mvn clean package
• Ensured that the code meets the current checkstyle coding style definition: mvn clean verify -Pcheckstyle -Dmaven.test.skip=true -B

[TheSnoozer]

Thank you for the contribution :-)
Besides the small comment regarding the CODEBUILD_BUILD_ARN property the changes look good for me.

[TheSnoozer]

Thanks again for your contribution! Looks good now, I'm going ahead and merge.