Bug 167450 [DataBinding] Get rid of bind support factory magic
I finally realized that we don't need that other magic factory. I'll move fillBindSpecDefaults() and the methods it calls (createConverter, createValidator etc) to a new class DefaultBindSpec. Clients who want default validators and converters created for them just create a DefaultBindSpec as opposed to a (rather empty) BindSpec. I will also move the early type checking into DefaultBindSpec to make it optional as well.
tests/org.eclipse.jface.tests.databinding/src/org/eclipse/core/tests/databinding/observable/map/ObservableMapTest.java
int count;
			
			public void handleMapChange(IObservableMap source, MapDiff diff) {
				count++;
			}			
		};
		
		MapChangeListener listener = new MapChangeListener();
		map.addMapChangeListener(listener);
		
		assertEquals(0, listener.count);
		map.fireMapChange(null);
		assertEquals(1, listener.count);
		
		map.dispose();
		try {
			map.fireMapChange(null);
		} catch (Exception e) {