Use message service in metadata

src/main/webapp/app/search/metadata/metadata.component.html

@@ -2,7 +2,7 @@
     <span class="meta" jhiTranslate="search.metadata.{{parameter}}">file format</span>
     <li class="meta" *ngFor="let frequency of frequencies">
         <div>
-            <a (click)="suggestionWasClicked(frequency)" class="meta">{{frequency.key}}<span
+            <a (click)="messageService.updateFilterSelection(frequency)" class="meta">{{frequency.key}}<span
                 class="count">{{frequency.value}}</span></a>
         </div>