Upgrade testing improvements

Work Items:
[sbeattie] test dapper -> hardy -> lucid upgrades (needs to happen early to give time for hardy SRUs): TODO
[sbeattie] test jaunty -> karmic -> lucid upgrades: TODO
[sbeattie] expand and automate setup of upgrade environments (e.g. raid, LVM, crypt, side-by-side, package-sets): TODO
[sbeattie] improve and automate post-install/upgrade sanity checking script: TODO
[sbeattie] create tool to compare packages,files in two VMs, to find differences between upgraded systems and fresh installs: TODO
mago script + automation to drive update-manager hardy->lucid upgrades: TODO
Upgrade testing in the certification lab: TODO
[sbeattie] generate community assistance, awareness through mail lists, blog posts, posts to ubuntu-forums: TODO