added EasterEgg for pugx/badge-poser repository

adding this into parameters.yml

```yml
package_manager.class: PUGX\BadgeBundle\Service\EasterEggPackageManager
```

the pugx/badge-poser has magic and randomic downloads number :) 

### why?

Because we could remove the symfony example, and put badge-poser :+1: 

what do you think? Is easy to enable and disable ...