GitLab

- Moved XACML/JSON profile tests (conformance, etc.) to module pdp-testutils
- Fixed XacmlJsonUtils.canonicalizeResponse() to work around this issue when comparing JSONObjects: https://github.com/stleary/JSON-java/issues/589
- Changed visibility of default XACML/XML Request preprocessor to public

Remove xslt version in SAXON configuration (useless since saxon 9.8, xslt 3.0 always used by defualt)

- Upgraded Maven parent project to 8.0.0
- As part of Java 11 migration, upgraded JAXB (Jakarta XML Bining) to v2.3.3
- Upgraded authzforce-ce-core-pdp-api to v18.0.0
- Fixed CVE on jackson-databind -> v2.9.10.8
- Upgraded authzforce-ce-xacml-json-model: 3.0.0
- Replaced findbugs maven plugin with spotbugs
- updated license headers for year 2021

Bump junit from 4.11 to 4.13.1

Bumps [junit](https://github.com/junit-team/junit4) from 4.11 to 4.13.1.
- [Release notes](https://github.com/junit-team/junit4/releases)
- [Changelog](https://github.com/junit-team/junit4/blob/main/doc/ReleaseNotes4.11.md)
- [Commits](https://github.com/junit-team/junit4/compare/r4.11...r4.13.1

)
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