Reasons for creating this PR

One of the Skosmos 2 PHPUnit tests (ModelTest::testGetResourceFromUri) was frequently failing, e.g. this run.

The problem is that this test triggers a HTTP request to Finto, which can sometimes take a bit longer than 2 seconds. This causes a HTTP timeout in the LinkedDataResolver code. The fix is to increase the httpTimeout in testconfig.ttl to 8 seconds.

A very similar fix for another flaky test was done recently for Skosmos 3 in PR #1652 .

Link to relevant issue(s), if any

none

Description of the changes in this PR

• increase httpTimeout from 2 to 8 seconds in testconfig.ttl
• change the PHPUnit test that checks the httpTimeout value accordingly

Known problems or uncertainties in this PR

8 seconds should be enough for anyone, right?

Checklist

• phpUnit tests pass locally with my changes
• I have added tests that show that the new code works, or tests are not relevant for this PR (e.g. only HTML/CSS changes)
• The PR doesn't reduce accessibility of the front-end code (e.g. tab focus, scaling to different resolutions, use of .sr-only class, color contrast)
• The PR doesn't introduce unintended code changes (e.g. empty lines or useless reindentation)