chore: upgrade to new Zone.js API v0.6.2

BREAKING CHANGE

Removed deprecated API from NgZone
- `NgZone.overrideOnTurnStart`
- `NgZone.overrideOnTurnDone`
- `NgZone.overrideOnEventDone`
- `NgZone.overrideOnErrorHandler`

Rename NgZone API
- `NgZone.onTurnStart` => `NgZone.onUnstable`
- `NgZone.onTurnDone` => `NgZone.onMicrotaskEmpty`
- `NgZone.onEventDone` => `NgZone.onStable`

Closes #7345

modules/angular2/test/router/route_config/route_config_spec.ts

@@ -51,7 +51,7 @@ export function main() {
       el = DOM.createElement('app-cmp', fakeDoc);
       DOM.appendChild(fakeDoc.body, el);
       var logger = new _ArrayLogger();
-      var exceptionHandler = new ExceptionHandler(logger, !IS_DART);
+      var exceptionHandler = new ExceptionHandler(logger, false);
       testBindings = [
         ROUTER_PROVIDERS,
         provide(LocationStrategy, {useClass: MockLocationStrategy}),