Remove .rawCollection method from DatabaseController.

src/Adapters/Storage/Mongo/MongoCollection.js

@@ -64,6 +64,10 @@ export default class MongoCollection {
     return this._mongoCollection.update(query, update, { upsert: true });
   }
 
+  updateMany(query, update) {
+    return this._mongoCollection.updateMany(query, update);
+  }
+
   // Atomically find and delete an object based on query.
   // The result is the promise with an object that was in the database before deleting.
   // Postgres Note: Translates directly to `DELETE * FROM ... RETURNING *`, which will return data after delete is done.