Merged in DSC-1500-hide-the-possibility-download-files-main-cris (pull request DSpace#1320)

DSC-1500 hide the possibility download files main cris

Approved-by: Francesco Molinaro

Author: vNovski

src/app/cris-layout/cris-layout-matrix/cris-layout-box-container/boxes/metadata/rendering-types/thumbnail/thumbnail.component.spec.ts

@@ -299,7 +299,7 @@ describe('ThumbnailComponent', () => {
       });
 
       it('should show thumbnail content image src', () => {
-/*        expect(component.default).toBe('assets/images/person-placeholder.svg');
+/*        expect(component.default).toBe('assets/images/file-placeholder.svg');
         const image = fixture.debugElement.query(By.css('img[src="http://localhost:8080/server/api/core/bitstreams/thumbnail-6df9-40ef-9009-b3c90a4e6d5b/content"]'));
         expect(image).toBeTruthy();*/
         expect(component.thumbnail$.value).toEqual(mockThumbnailWithType);