Bug 299340 [CommonNavigator] Enable new CNF tests
Enable the contributed CNF tests, make minor test improvements.
tests/org.eclipse.ui.tests.navigator/src/org/eclipse/ui/tests/navigator/NavigatorTestBase.java
protected String _navigatorInstanceId;
	protected Set _expectedChildren = new HashSet();
	protected IProject _project;
	protected IProject _p1;
	protected IProject _p2;
	protected static final int _p1Ind = 0;
	protected static final int _p2Ind = 1;
	protected static final int _projectInd = 2;
	protected static int _projectCount;
	protected CommonViewer _viewer;
	protected CommonNavigator _commonNavigator;
	protected INavigatorContentService _contentService;
	protected NavigatorActionService _actionService;
	protected boolean _initTestData = true;
	protected static final boolean DEBUG = false;
	protected void setUp() throws Exception {
		if (_navigatorInstanceId == null) {
			throw new RuntimeException(
					"Set the _navigatorInstanceId in the constructor");
		}
		
		if (!_navigatorInstanceId.equals(ProjectExplorer.VIEW_ID))
			EditorTestHelper.showView(ProjectExplorer.VIEW_ID, false);
		TestContentProviderPipelined.resetTest();
		TestContentProviderResource.resetTest();
		TestSorterData.resetTest();
		TestSorterResource.resetTest();
		TestLabelProvider.resetTest();