autotest/virt-test — pull request #991 by cevich (2013-11-01 19:36:14+00:00)
Title: Virsh update device

In addition to Jeff's updates (originally pull #901) I moved around blocks of code to help the test "flow" better. I also updated all the device XML handling code to use the current disk-device ORM code, eliminating minidom. Finally, I tracked down the exact spot where we can verify modern "compatibility" ``--persistent`` option behavior. For now, if the minimum version isn't met, the test is skipped. However, if we ever need to test pre-behavior change, the logic additions wouldn't be impossibly complex.