Move from PhantomJS to Nightmare and fix a test.

src/app/app.component.spec.ts

@@ -1,5 +1,6 @@
 import {AppComponent} from './app.component';
 import {async, ComponentFixture, TestBed} from '@angular/core/testing';
+import {FormsModule} from '@angular/forms';
 import {InputComponentManagerService} from './inputcomponentmanager.service';
 import {Step} from './step';
 
@@ -18,6 +19,7 @@ describe('AppComponent', () => {
     /*return */
     TestBed.configureTestingModule({
       declarations: [AppComponent],
+      imports: [FormsModule],
       providers: [{
         provide: InputComponentManagerService, useValue: inputComponentManagerServiceStub
       }]