AbstractConfigFactory returns complete configuration array at first config call

[ed-posinitskiy]

Zend\Config\AbstractConfigFactory returns complete configuration array instead of a requested configuration key at first call.

public function createServiceWithName(ServiceManager\ServiceLocatorInterface $serviceLocator, $name, $requestedName)
    {
        ...

        $config = $serviceLocator->get('Config');
        $this->configs[$requestedName] = $this->configs[$key] = $config[$key];
        return $config;
    }

[Ocramius]

Handled in #7144