Sort JUnit bundles by name to ensure a consistent ordering

Currently Junit bundles and their closure is just returned in a quite
random order. This leads to sometimes triggering a rebuild because
classpath seems to have changed.

This now sort them by their bundle id to ensure to have always the same
order.

Author: laeubi

ui/org.eclipse.pde.core/src/org/eclipse/pde/internal/core/RequiredPluginsClasspathContainer.java

@@ -629,7 +629,8 @@ private static List<BundleDescription> collectJunit5RuntimeRequirements() {
 		Set<BundleDescription> closure = DependencyManager.findRequirementsClosure(roots,
 				INCLUDE_OPTIONAL_DEPENDENCIES);
 		String systemBundleBSN = TargetPlatformHelper.getPDEState().getSystemBundle();
-		return closure.stream().filter(b -> !b.getSymbolicName().equals(systemBundleBSN)).toList();
+		return closure.stream().filter(b -> !b.getSymbolicName().equals(systemBundleBSN))
+				.sorted(Comparator.comparing(BundleDescription::getSymbolicName)).toList();
 	}
 
 	private void addSecondaryDependencies(BundleDescription desc, Set<BundleDescription> added,