Migrate test suites in org.eclipse.ui.tests to JUnit 5#3246

HeikoKlare wants to merge 1 commit intoeclipse-platform:mastereclipse-platform/eclipse.platform.ui:masterfrom

HeikoKlare:org.eclipse.ui.tests-junit5-suitesHeikoKlare/eclipse.platform.ui:org.eclipse.ui.tests-junit5-suitesCopy head branch name to clipboard