[5.1] BeanstalkdJob bury function delete job unexpectedly (#13963)

* [BUG][5.1] Beanstalkd bury job is not working

Job will be deleted whenever bury job function is called.

Due to the release flag is not mark, every job goin to bury will be delete eventually.
```php
        if (! $job->isDeletedOrReleased()) {
            $job->delete();
        }
```

* Update BeanstalkdJob.php

src/Illuminate/Queue/Jobs/BeanstalkdJob.php

@@ -97,6 +97,8 @@ public function release($delay = 0)
      */
     public function bury()
     {
+        parent::release();
+
         $this->pheanstalk->bury($this->job);
     }