autotest/virt-test — pull request #963 by xiaoqing-wei (2013-10-24 04:32:18+00:00)
Title: update Win8.1 2012R2 to GA

and add a new unattended file for 2012R2
as it require differ product string compare to 2012
"Windows Server 2012 R2 SERVERDATACENTER"

Signed-off-by: Xiaoqing Wei