libvirt 0.7.7 and Lucid

[Dustin Kirkland]

Per conversation in IRC [1], I'm recommending that we stick with
libvirt 0.7.5 for Lucid, due to the incompatibility it introduces with
hotplug of scsi disks (and the resulting regression it introduces in
UEC/Eucalyptus for EBS volumes).

[1] http://irclogs.ubuntu.com/2010/04/02/%23ubuntu-server.html#t15:33

Maverick will certainly introduce >= libvirt 0.7.7, which will force
us to move to virtio disks for UEC/Eucalyptus (which will introduce a
nice performance bump, and possibly a stability enhancement, but most
importantly align us with upstream's recommended way of adding disks),
and we'll have an entire release cycle to work our way through any
issues that arise (rather than a mere 2 hectic weeks).

Tremendous thanks to you, Jamie, for all the work you've done on
Libvirt, helping the Ubuntu Server team out immensely in the Karmic
and Lucid cycles!!!

Cheers,
:-Dustin