[Merge] lp:~stgraber/ubuntu-archive-tools/isotracker-fixes into lp:ubuntu-archive-tools

[Stéphane Graber]

Updated for python3.x now (tested with list-builds-on-tracker.py post-amis-to-iso-tracker.py on both python2.7 and python3.2).
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https://code.launchpad.net/~stgraber/ubuntu-archive-tools/isotracker-fixes/+merge/90957
Your team Ubuntu Package Archive Administrators is requested to review the proposed merge of lp:~stgraber/ubuntu-archive-tools/isotracker-fixes into lp:ubuntu-archive-tools.