(UCO Issue 373) Upgrade rdf-toolkit and Java

[ajnelson-nist]

This Pull Request is part of resolving UCO Issue #373.

This PR is a little out of the normal, ontology-scoped review form, because of a shared technology issue. UCO and CASE both use rdf-toolkit.jar to handle normalizing Turtle data. The upgrade in UCO Issue 373 will upgrade Java and rdf-toolkit.jar to a state that will be incompatible with the version of Java and rdf-toolkit.jar that CASE has "pinned" for its CI.

Hence, the patches in this PR handle two issues:

1. Delegating to UCO handling of rdf-toolkit.jar retrieval.
2. Upgrading CASE to also use Java 11.

Review steps taken:

• Tracking in Jira ticket UCO OC-235
• [x] Pull request is against correct branch
• [x] CI passes in (CASE/UCO) feature branch
• [x] CI passes in (CASE/UCO) current unstable branch (merge-commit)
• [x] Impact on SHACL validation reviewed for CASE-Examples
• [x] Impact on SHACL validation remediated for CASE-Examples (N/A)
• [x] Impact on SHACL validation reviewed for casework.github.io
• [x] Impact on SHACL validation remediated for casework.github.io

[ajnelson-nist]

In Dutch, we use the abbreviation GB when we don't find any peculiarities worth mentioning. How would that translate in English?

LGTM, "Looks Good To Me," is probably closest.