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)
Signed-off-by: dependabot[bot] <support@github.com>

- Upgraded parent project to 7.6.1
- Upgraded authzforce-ce-core-pdp-api dependency to 17.0.0
- Support for combining multiple Policy Providers as one
- Changed (enhancement) the PDP XML schema to support:
    - Multiple policyProvider elements
	- Inline PolicySets in StaticPolicyProvider type (XACML PolicySets
embedded in the PDP configuration), in addition to policy locations
(URLs)
- Core StaticPolicyProvider enhancement:
	- Support of inline PolicySets defined in the XML config as input (new
'policy' element), may be combined with policyLocations (URLs)
	- Support of third-party static policy provider to help resolve policy
references not supported internally; in other words, the policy provider
can be combined with other static policy providers.
- Replace use of guava Charset class with standard java Charset

java.util.function.Supplier

Add Java 8 requirement for building using Maven

java.xml.bind is no longer part of Java SE (starting with version 11, was disable by default in version 10).
This change make the build fail if using Java 11.
I added a note in the "Building the project" section to warn the user.
Long term solution would be to update the project dependency to add the missing library.