Mark ResourceNavigatorTest for deletion

As ResourceNavigator is marked for deletion do the same for its tests in
order to silence the compile warnings.

tests/org.eclipse.ui.tests/Eclipse UI Tests/org/eclipse/ui/tests/navigator/ResourceNavigatorTest.java

@@ -40,6 +40,7 @@
 import org.junit.runners.JUnit4;
 
 @RunWith(JUnit4.class)
+@Deprecated(forRemoval = true)
 public class ResourceNavigatorTest extends UITestCase {
 	private IWorkbenchPage activePage;