[Merge] ~zioproto/ubuntu/+source/nova:stable/liberty into ~ubuntu-server-dev/ubuntu/+source/nova:stable/liberty

[Saverio Proto]

Saverio Proto has proposed merging ~zioproto/ubuntu/+source/nova:stable/liberty into ~ubuntu-server-dev/ubuntu/+source/nova:stable/liberty.

Requested reviews:
  James Page (james-page)

For more details, see:
https://code.launchpad.net/~zioproto/ubuntu/+source/nova/+git/nova/+merge/305234

    Fix resizing in imagebackend.cache() (LP: #1608934)

    * Fix resizing in imagebackend.cache() (LP: #1608934)
      - d/p/nova-367412-rebased.patch
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