Put message service into metadata

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

-import {Component, EventEmitter, Input, Output} from '@angular/core';
-import {IFrequency} from "app/shared/model/frequency.model";
+import { Component, Input } from '@angular/core';
+import { IFrequency } from 'app/shared/model/frequency.model';
+import { MessageService } from 'app/search/metadata-message.service';
 
 @Component({
   selector: 'jhi-home-metadata',
   templateUrl: './metadata.component.html',
   styleUrls: ['./metadata.scss'],
 })
-export class MetadataComponent<T> {
-  @Input() frequencies!: IFrequency<T>[] | undefined;
+export class MetadataComponent {
+  @Input() frequencies!: IFrequency<string>[] | undefined;
   @Input() parameter!: string;
-  @Output() onSuggest: EventEmitter<IFrequency<T>> = new EventEmitter();
 
-  constructor() {
-  }
-
-  suggestionWasClicked(frequency: IFrequency<T>): void {
-    this.onSuggest.emit(frequency);
-  }
+  constructor(public messageService: MessageService) {}
 }