fix(renderer): apply host element encapsulation also if the parent component is not encapsulated.

Closes #5240

modules/angular2/test/core/render/view_factory_spec.ts

@@ -611,11 +611,11 @@ export function main() {
                           'innerComp', 'innerid', ViewEncapsulation.Emulated,
                           [beginElement('div', [], [], false, null), endElement()], []));
              var view = createRenderView(
-                 encapsulatedTpl, [beginComponent('my-comp', [], [], null, '0'), endComponent()],
+                 defaultCmpTpl, [beginComponent('my-comp', [], [], null, '0'), endComponent()],
                  null, nodeFactory);
              expect(stringifyFragment(view.fragments[0].nodes))
                  .toEqual(
-                     '<my-comp _ngcontent-shortid="" _nghost-innerid=""><div _ngcontent-innerid=""></div></my-comp>');
+                     '<my-comp _nghost-innerid=""><div _ngcontent-innerid=""></div></my-comp>');
            });
       });
     });