purl-next: Implement updated PURL test suite in packageurl-java

[pombredanne]

Java https://github.com/package-url/packageurl-java

[pombredanne]

This is completed and has been merged with this PR:

• Run tests using reference data from purl-spec packageurl-java#1

This has also been submitted upstream with this PR:

• test: Run tests using reference data from purl-spec package-url/packageurl-java#252