[Bug 1524216] [NEW] nova script: use image UUID

[Martin Pitt]

Public bug reported:

When grepping for the latest active image, use an image's UUID for nova
boot instead of the name. This avoids failing on

CommandError: Multiple image matches found for 'ubuntu/ubuntu-xenial-adt-i386-server-20151209.img', use an ID to be more specific.
ERROR: Multiple image matches found for 'ubuntu/ubuntu-xenial-adt-i386-server-20151209.img', use an ID to be more specific.

** Affects: autopkgtest (Ubuntu)
     Importance: Low
     Assignee: Martin Pitt (pitti)
         Status: In Progress

** Changed in: autopkgtest (Ubuntu)
       Status: New => In Progress

** Changed in: autopkgtest (Ubuntu)
   Importance: Undecided => Low

** Changed in: autopkgtest (Ubuntu)
     Assignee: (unassigned) => Martin Pitt (pitti)

** Changed in: autopkgtest (Ubuntu)
    Milestone: None => ubuntu-15.12

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https://bugs.launchpad.net/bugs/1524216

Title:
  nova script: use image UUID

Status in autopkgtest package in Ubuntu:
  In Progress

Bug description:
  When grepping for the latest active image, use an image's UUID for
  nova boot instead of the name. This avoids failing on

  CommandError: Multiple image matches found for 'ubuntu/ubuntu-xenial-adt-i386-server-20151209.img', use an ID to be more specific.
  ERROR: Multiple image matches found for 'ubuntu/ubuntu-xenial-adt-i386-server-20151209.img', use an ID to be more specific.

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