[Maintenance] Execute PHPUnit only if its config exists
[Maintenance] Execute PHPUnit only if its config exists

loic425/Sylius,lchrusciel/Sylius,SyliusBot/Sylius,101medialab/Sylius,diimpp/Sylius,101medialab/Sylius,Zales0123/Sylius,diimpp/Sylius,loic425/Sylius,loic425/Sylius,lchrusciel/Sylius,Zales0123/Sylius,SyliusBot/Sylius,Zales0123/Sylius,101medialab/Sylius,lchrusciel/Sylius,Sylius/Sylius,SyliusBot/Sylius,diimpp/Sylius,Sylius/Sylius,Sylius/Sylius