Ignore test if not on Linux, in setUp()

Fixes: #843

Author: trancexpress

org.eclipse.jdt.debug.tests/tests/org/eclipse/jdt/debug/tests/core/MultiReleaseLaunchTests.java

@@ -64,6 +64,7 @@ public MultiReleaseLaunchTests(String name) {
 
 	@Override
 	protected void setUp() throws Exception {
+		assumeTrue("Not on Linux", Platform.OS.isLinux());
 		super.setUp();
 		final Set<File> existingLocations = new HashSet<>();
 		List<RequiredJavaVersion> requiredJavaVersions = new ArrayList<>(List.of(JAVA_11, JAVA_17, JAVA_21));
@@ -115,7 +116,6 @@ protected IJavaProject getProjectContext() {
 	}
 
 	public void testMultiReleaseLaunch() throws Exception {
-		assumeTrue("Not on Linux", Platform.OS.isLinux());
 		ILaunchConfiguration config = getLaunchConfiguration("p.Main");
 		Properties result = launchAndReadResult(config, 11);
 		assertTrue("Was not launched with a proper Java installation " + result, JAVA_11.matches(result.getProperty("Java")));