Add a retry-attempts option.

The default number of maximum retry attempts is **3**. That number can be overridden by the extra data of the command.
Now, if you want to set a retry attempt for a specific queue, you can override both the default parameter and the extra data by setting the `retry-attempts` option with an integer number.

    --retry-attempts=2
well, either you use ``if (null !== $input->getOption('retry-attempts'))``, or you move the logic building ``$attempts`` based on ``$this->extras`` into the default value of the option and you just write ``$options['retry_attempts'] = (int) $input->getOption('retry-attempts');`` all the time