- Change dep authzforce-ce-core-pdp-api: 15.0.0->15.1.0
- upgraded dep authzforce-ce-xacml-json-model: 1.1.0->2.0.0
- Fixed #13:
  - Changed dep mongo-java-driver in testutils module: 2.14.12 -> 3.5.0
  - Idem for jongo: 1.3. -> 1.4.0
- XML StaticRefPolicyProvider type / CoreRefPolicyProvider class:
  - added support for recursive directory searching for policies, e.g.
pattern .../*/*.xml for searching on two directory levels
  - added option to ignore old versions (keep only the latest) when
multiple versions of same policy ID available (ignoreOldVersions=true in
xml config pdp.xsd)
- Simplified for code for detecting duplicate enclosed policy ID/version