Added 'include' as Configuration Setting to Bundle Parsing

Adds 'include' as bundle parsing option to <env>.yml. If include is given, only classes from include-option will be taken. This is a workaround NOT running into Parsing Errors/Exceptions.

Example:
     
dev.yml:
ApplicationBundle:
        namespace: MyApp\ApplicationBundle
        include: Service\Gearman\Worker

Outcome:

Only MyApp\ApplicationBundle\Service\Gearman\Worker will be parsed.