add tests for instance -> search -> component -> result

...rch/components/result/cone-search-image.component.spec.ts

...rch/components/result/datatable-actions.component.spec.ts

...ance/search/components/result/datatable.component.spec.ts

...earch/components/result/download-result.component.spec.ts

...rch/components/result/image-list-result.component.spec.ts

...ts/result/renderer/detail-link-renderer.component.spec.ts

.../instance/search/components/result/renderer/index.spec.ts

...ce/search/components/result/result-info.component.spec.ts

...search/detail/components/detail-content.component.spec.ts

client/src/app/instance/search/detail/detail.module.spec.ts