vz.conf: set default OS template to centos-6-x86

1. CentOS 5 is old, it makes sense to make CentOS 6 a default.

2. Even on an x86_64 host it makes much sense to run 32-bit container
so make it a default.

Signed-off-by: Kir Kolyshkin <kir@openvz.org>
1 file changed