Bug 277513 [Compatibility] Remove WorkbenchFactory
The factory is currently used to call the e4 Workbench constructor, but it adds another layer of indirection that we don't need at this point in time. PW
tests/org.eclipse.e4.ui.tests/src/org/eclipse/e4/ui/tests/workbench/RunApplicationTest.java
Filter filter = null;
			try {
				filter = bundleContext.createFilter(Location.INSTANCE_FILTER);
			} catch (InvalidSyntaxException e) {
				
				
			}
			instanceLocation = new ServiceTracker(bundleContext, filter, null);
			instanceLocation.open();
		}
		return (Location) instanceLocation.getService();
	}
	protected IApplicationContext getApplicationContext() {
		if (instanceAppContext == null) {
			instanceAppContext = new ServiceTracker(bundleContext,
					IApplicationContext.class.getName(), null);
			instanceAppContext.open();
		}
		return (IApplicationContext) instanceAppContext.getService();
	}
	protected PackageAdmin getBundleAdmin() {
		if (bundleTracker == null) {
			if (bundleContext == null)
				return null;
			bundleTracker = new ServiceTracker(bundleContext,
					PackageAdmin.class.getName(), null);
			bundleTracker.open();
		}
		return (PackageAdmin) bundleTracker.getService();
	}