use try with resources in JSONLDUtil

[pdurbin]

What this PR does / why we need it:

According to Sonarcloud:

"Failure to properly close resources will result in a resource leak which could bring first the application and then perhaps the box the application is on to their knees."

Which issue(s) this PR closes:

• Closes In JSONLDUtil.java use try-with-resources for JsonObject jsonld = Json.createReader(rdr).readObject(); in method decontextualizeJsonLD(...) #9313

Special notes for your reviewer:

See #9879 for screenshots and notes about how Netbeans doesn't show this as an error for me. Any tips on getting this working are very welcome.

Suggestions on how to test this:

This is exercised by DatasetsIT. To test manually, use this API endpoint from the Semantic API:

.accept("application/ld+json")
.get("/api/datasets/" + datasetId + "/metadata");

Does this PR introduce a user interface change? If mockups are available, please link/include them here:

No.

Is there a release notes update needed for this change?:

No.

Additional documentation:

None.

[rtreacy]

Looks good

[coveralls]

coverage: 19.969%. remained the same when pulling 9c1819b on 9313-jsonld-try into 62a9811 on develop.

[github-actions]

📦 Pushed preview images as

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