Fixing broken AdvancedSearchManager constructor

Author: afoote-mitre

src/search/AdvancedSearchManager.ts

@@ -33,13 +33,7 @@ export class AdvancedSearchManager extends BasicSearchManager {
    *                            default is to read it from environment variables
    */
   constructor(searchProviderSpec: SearchProviderSpec = undefined) {
-    super();
-    if (!searchProviderSpec) {
-      searchProviderSpec = SearchProviderSpec.getDefaultSearchProviderSpec()
-    }
-    this._searchReader = new SearchReader(
-      searchProviderSpec.providerEndpoint,
-      searchProviderSpec.index);
+    super(searchProviderSpec);
   }
 
   /** search for text at search provider