docs(aio): update migrated content from anguar.io

aio/content/examples/testing/src/app/dashboard/dashboard.module.ts

@@ -0,0 +1,20 @@
+import { NgModule }               from '@angular/core';
+import { RouterModule, Routes }   from '@angular/router';
+
+import { SharedModule }           from '../shared/shared.module';
+
+import { DashboardComponent }     from './dashboard.component';
+import { DashboardHeroComponent } from './dashboard-hero.component';
+
+const routes: Routes =  [
+  { path: 'dashboard',  component: DashboardComponent },
+];
+
+@NgModule({
+  imports:      [
+    SharedModule,
+    RouterModule.forChild(routes)
+  ],
+  declarations: [ DashboardComponent, DashboardHeroComponent ]
+})
+export class DashboardModule { }