[CentOS] Stop the FUD Xen is not deprecated

>
> Right now we have a about 30 servers. Mixture of CentOS,debian,slack,windows.
> Free is always the best cost and is why we have been moving toward open
> source as much as possible.
>   


i see nothing 'wrong' with using Xen for now and for quite a few years 
yet - its not going anywhere anytime soon