Bug 283442 [UI] Refactor the rendering class names
In order to bring the model closer to the way in which we talk about it we should re-factor it to remove references to 'factory'. For now the re-factoring will to replace 'PartRenderer' with 'PartRenderingEngine' and to replace '<xxx>Factory' with '<xxx>Renderer'. Post 0.9 we expect to change these again but this will make the initial story clearer.
tests/org.eclipse.e4.ui.tests/src/org/eclipse/e4/ui/tests/workbench/RenderingTestCase.java
renderer = new PartRenderer(contributionFactory, appContext);
		Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
			public void run() {
				Workbench.initializeRenderer(RegistryFactory.getRegistry(),
						renderer, appContext, contributionFactory);
			}
		});
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see junit.framework.TestCase#tearDown()
	 */
	@Override
	protected void tearDown() throws Exception {
		System.out.print("tearDown");
		super.tearDown();
		
		appContext = null;
		renderer = null;
		if (topWidget != null) {
			if (!topWidget.isDisposed())
				topWidget.dispose();
			
			
			topWidget = null;
		}
		System.out.println("  time: "
				+ (System.currentTimeMillis() - startTime) + "ms");
	}