dynamic configs ignored for test retries

#### What are you trying to achieve?

Dynamic configs applied to retries as well

#### What do you get instead?

Dynamic configs are ignored for retries after a test fails

```js
Feature('test');

Scenario('test', I => {
I.amOnPage('http://github.com');
I.waitInUrl('fail');
})
.retry(1)
.config({ show: true }); // will be ignored for the second run
```

### Details

* CodeceptJS version: 2.2.1
* NodeJS Version: v8.16.0
* Operating System: MacOS 10.14.4