Enable PVP and PVVP deployments for Vanilla OVS

Enable PVP and PVVP deployments for Vanilla OVS

Support for PVP and PVVP scenerios using Vanilla OVS was added.
VMs are configured to forward traffic between virtual interfaces
by standard linux capabilities. Traffic generator script was updated
to accept MAC and IP address configuration to allow VM forwarding
configuration.

VSPERF-66, VSPERF-70

Change-Id: Ia70ab6be547b39928a1eae319faba779d4e29284
Signed-off-by: Martin Klozik <martinx.klozik@intel.com>
Signed-off-by: Dino Simeon Madarang <dino.simeonx.madarang@intel.com>
Reviewed-by: Maryam Tahhan <maryam.tahhan@intel.com>
Reviewed-by: Brian Castelli <brian.castelli@spirent.com>
Reviewed-by: Gene Snider <eugene.snider@huawei.com>
Reviewed-by: Al Morton <acmorton@att.com>
Reviewed-by: Tv Rao <tv.rao@freescale.com>