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/LabelProviderTest.java
public LabelProviderTest() {
		_navigatorInstanceId = "org.eclipse.ui.tests.navigator.OverrideTestView";
	}
	private static final int NONE = 0;
	private static final int OVERRIDDEN = 1;
	private static final int OVERRIDING = 2;
	private static final int BOTH = 3;
	private static final boolean BLANK = true;
	private static final boolean NULL = false;
	private static final String PLAIN = "Plain";
	private void setBlank(String cpToGet, boolean blank) {