Aggregate supports group by date fields (#5538)

* it actually supports group by date fields

* Changing the field name again to see Travis logs

* Adding match stage to the test

* Adding test for group by date fields on postgres

src/Adapters/Storage/Mongo/MongoStorageAdapter.js

@@ -765,12 +765,6 @@ export class MongoStorageAdapter implements StorageAdapter {
           maxTimeMS: this._maxTimeMS,
         })
       )
-      .catch(error => {
-        if (error.code === 16006) {
-          throw new Parse.Error(Parse.Error.INVALID_QUERY, error.message);
-        }
-        throw error;
-      })
       .then(results => {
         results.forEach(result => {
           if (result.hasOwnProperty('_id')) {