Multiple OVS version support should be

[xenolog]

Main idea:

use_ovs => false -- don't use OVS. start any OVS utilities should be prohibited in the providers.
use_ovs => true -- will be used default OVS packages and kernel module for os
use_ovs => '2.3' -- will be configured external repository and install corresponded ovs version from it
use_ovs => '2.4' -- another OVS from another repo
use_ovs => {
  version => ....
  repo => .....
  pkg_common =>
  pkg_service =>
  pkg_datapsth =>
} -- for high level of customization