Bug 166600 [DataBinding] Refactor tests to be in the correct packages
tests/org.eclipse.jface.tests.databinding/src/org/eclipse/jface/tests/internal/databinding/provisional/observable/AbstractObservableTest.java
int count;
		IObservable source;
		public void handleChange(ChangeEvent event) {
			count++;
			this.source = event.getObservable();
		}
	}
	private class StaleListener implements IStaleListener {
		int count;
		IObservable source;
		public void handleStale(StaleEvent event) {
			count++;
			this.source = event.getObservable();
		}
	}
	private static class ObservableStub extends AbstractObservable {
		public ObservableStub() {
			this(Realm.getDefault());
		}
		/**
		 * @param realm
		 */
		public ObservableStub(Realm realm) {
			super(realm);