[one-users] minor typo in ONE 2.2 docs [xen -> kvm]

[knawnd at gmail.com]

There is a minor typo in ONE 2.2 docs [1] in the section "Driver Files". 
The line
$ONE_LOCATION/lib/remotes/vmm/xen :commands executed to perform actions

has to be

$ONE_LOCATION/lib/remotes/vmm/kvm :commands executed to perform actions

BR,

Nikolay.

[1] http://opennebula.org/documentation:rel2.2:kvmg