Moved the environment setup

I propose call `getEnvironmentSetUp` earlier so that people can make config modifications before all the service providers have booted.

~~If you want, I could put it here instead?~~ **DONE**

```php
$app->make('Illuminate\Foundation\Bootstrap\RegisterProviders')->bootstrap($app);
$this->getEnvironmentSetUp($app);
$app->make('Illuminate\Foundation\Bootstrap\BootProviders')->bootstrap($app);
```