ignore updates on nbd device
ignore updates on nbd device

- adds regex to ignore updates on nbd device
  similar to 'rbd' and 'dm'

Signed-off-by: Umanga Chapagain <078ce6f6b416ac444a5caae3922c36dd4ff12c22@gmail.com>

rook/rook,rook/rook,rook/nfs,rook/rook,rook/nfs,rook/rook,rook/rook,rook/nfs