Bumped VTN version in Virtualization Edition.

This patch bumped version of VTN Coordinator to 6.0.0.0 in
Virtualization Edition.

Change-Id: Ib89f900e892053136136a4fd56d9f31a6ace4c0d
Signed-off-by: Hideyuki Tai <Hideyuki.Tai@necam.com>