Pyroute2 network configurator

Network configurator used for setting network devices.
Configuration is done using pyroute2 library.

Change-Id: Ife1ba6fca28f04bc1b171313bfb57bf630f8bc7a
Signed-off-by: Robert Cernak <robocernak@gmail.com>
Reviewed-on: http://gerrit.ovirt.org/27745
Reviewed-by: Antoni Segura Puimedon <asegurap@redhat.com>
Reviewed-by: Peter V. Saveliev <svinota.saveliev@gmail.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>
Tested-by: Dan Kenigsberg <danken@redhat.com>