[euca2ools/el6] (4 commits) ...Fix registration of EBS-backed images

[gholms]

Summary of changes:

  626fae5... Fix handling of empty block device sizes (*)
  f976639... Fix euca-describe-image-attribute -B output [LP:795395] (*)
  538015e... Backport support for bundle upload location constraints (*)
  0e7f3c5... Fix registration of EBS-backed images (*)

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