[cloud-init] (3 commits) ...Fix "resize_root: noblock"

[gholms]

Summary of changes:

  e8a0807... Rebase against version 0.7.1 (*)
  82213ac... Fix broken sudoers file generation (*)
  fac1467... Fix "resize_root: noblock" (*)

(*) This commit already existed in another branch; no separate mail sent