Bug 266769 [CommonNavigator] Reorg test identifiers
tests/org.eclipse.ui.tests.navigator/src/org/eclipse/ui/tests/navigator/ProgrammaticOpenTest.java
public ProgrammaticOpenTest() {
		_navigatorInstanceId = "org.eclipse.ui.tests.navigator.ProgrammaticTestView"; 
	}
	public void testNavigatorRootContents() throws Exception {
		assertEquals("There should be no visible extensions for the programmatic viewer.", 0, _contentService.getVisibleExtensionIds().length);
		_contentService.bindExtensions(new String[] { COMMON_NAVIGATOR_RESOURCE_EXT }, false);
		assertEquals("There should be one visible extension for the programmatic viewer.", 1, _contentService.getVisibleExtensionIds().length);
		_contentService.getActivationService().activateExtensions(new String[] { COMMON_NAVIGATOR_RESOURCE_EXT }, true);
		refreshViewer();
		_viewer.expandAll();
		TreeItem[] items = _viewer.getTree().getItems();
		assertTrue("There should be some items.", items.length > 0); 		
		assertEquals(_project, items[_projectInd].getData());
		
		_viewer.setSelection(new StructuredSelection(_project.getFile(".project"))); 
		TreeItem[] children = items[_projectInd].getItems();
		assertEquals(_expectedChildren.size(), children.length);
		for (int i = 0; i < children.length; i++) {