virtio_blk: adding unit tests for VIRTIO_BLK_T_GET_ID cmd
virtio_blk: adding unit tests for VIRTIO_BLK_T_GET_ID cmd

current kcov reported coverage for block.rs: 94.2%

Signed-off-by: Diana Popa <4240422768c1b315e51818a074064501037757cd@amazon.com>

firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker