Reconnect param on 3.0.1

Hi,

my tests fails after update version from 3.0.0 to 3.0.1. Issue:
_[Warning] Undefined array key "reconnect" at /var/www/html/vendor/codeception/module-amqp/src/Codeception/Module/AMQP.php:103_

It is about this line:
```
if ($this->config['reconnect']) {
$this->getChannel()->getConnection()->reconnect();
}
```

There is no `reconnect` param. Can you fix this i.e. by adding `isset` call?

打开 Codeception/Module/AMQP.php 的第 103 行，检查如何读取 config 数组。使用省略 reconnect 的配置重现警告，然后验证模块不再发出警告，同时在提供 reconnect 设置时仍能处理该设置。

由索引模型根据 Issue 内容生成。