Stop using a custom libvirt package to run the test suite

We currently need to patch libvirt to add support for the removable bit for USB devices. We’ve implemented this support and have merged it upstream. libvirt 1.1.3 will have it.

Feature Branch: test/rjb-integration

Parent Task: #6315 (closed)

Subtasks

#6316 (closed)
#6317 (closed)

Original created by @intrigeri on 6314 (Redmine)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information