refactor(forms): made directive names consistent

modules/angular2/src/forms/directives/control_container.ts

@@ -0,0 +1,13 @@
+import {Form} from './form_interface';
+import {List} from 'angular2/src/facade/collection';
+
+/**
+ * A directive that contains a group of [NgControl].
+ *
+ * @exportedAs angular2/forms
+ */
+export class ControlContainer {
+  name: string;
+  get formDirective(): Form { return null; }
+  get path(): List<string> { return null; }
+}