OZG-6300 fix test; adjust npm script to work at least

alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/collaboration-in-vorgang-container.component.spec.ts

 import { ComponentFixture, TestBed } from '@angular/core/testing';
-import { ButtonComponent, SaveIconComponent } from '@ods/system';
+import { ButtonComponent, CollaborationIconComponent, SaveIconComponent } from '@ods/system';
+import { MockComponent } from 'ng-mocks';
 import { CollaborationInVorgangContainerComponent } from './collaboration-in-vorgang-container.component';
 
 describe('CollaborationInVorgangContainerComponent', () => {
@@ -9,7 +10,10 @@ describe('CollaborationInVorgangContainerComponent', () => {
   beforeEach(async () => {
     await TestBed.configureTestingModule({
       imports: [ButtonComponent, SaveIconComponent],
-      declarations: [CollaborationInVorgangContainerComponent],
+      declarations: [
+        CollaborationInVorgangContainerComponent,
+        MockComponent(CollaborationIconComponent),
+      ],
     }).compileComponents();
 
     fixture = TestBed.createComponent(CollaborationInVorgangContainerComponent);