yardstick-verify: Mod yardstick-flavor for ovs scenarios

yardstick-verify: Mod yardstick-flavor for ovs scenarios

VMs used with DPDK-enabled OVS must have their memory backed by large pages.

Change-Id: Id685554183a76e8a6024d58920a9a9e187b90e24
Signed-off-by: Billy O'Mahony <billy.o.mahony@intel.com>
Reviewed-by: Ana Cunha <ana.cunha@ericsson.com>
Reviewed-by: Jorgen Karlsson <jorgen.w.karlsson@ericsson.com>
Reviewed-by: Jonas Bjurel <jonas.bjurel@ericsson.com>
Reviewed-by: Daniel Smith <daniel.smith@ericsson.com>
Reviewed-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>
Reviewed-by: Mark D. Gray <mark.d.gray@intel.com>
(cherry picked from commit 11a452a34c345abb7d882b151dd99c536f477650)