autotest/virt-test — pull request #630 by xiaoqing-wei (2013-07-12 09:59:43+00:00)
Title: rename qcow3 to qcow2_v3 and disable it on unsupported hosts

rename qcow3 to qcow2_v3 and disable it on unsupported hosts

Signed-off-by: Xiaoqing Wei