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This removes concept of exclusive device. The only use of it was to pass exclusive access to network interface but that is not essentially required as it is even more versatile to use macvlan as thus we can easily spawn multiple containers to simulate network. The only known use for physical device pass trough and thus exclusive is Wi-Fi. It won't be possible to use macvlan for it. At the same time this is not an issue as it is not expected that we are going to be reusing this interface in single tests run multiple times over and over. In the end there is no need to automatically suspend containers to steal devices as it has been implemented (and in reality not finished). The introduced device management now required all devices to be defined in image as attributes. This gives image definition control over name of this device in container. It is up to container user to assign appropriate real device for it. This is done using device map that is simply pair of attribute and real device specifier. This concept can be in future expanded to even encode additional configuration if have need for it.