regression: OVS/DPDK regression tests

regression: OVS/DPDK regression tests

A set of regression tests for verification of OVS/DPDK
features was introduced. Following features are tested:
* DPDK NIC Support
* DPDK Hotplug Support
* RX Checksum Support
* Flow Control Support
* Multiqueue Support
* Vhost User
* Virtual Devices Support
* NUMA Support
* Jumbo Frame Support
* Rate Limiting
* Quality of Service

JIRA: VSPERF-539

Change-Id: I6c83e9c38e29f197a5236ac68c88d7045fef775b
Signed-off-by: Martin Klozik <martinx.klozik@intel.com>
Signed-off-by: Martin Goldammer <martinx.goldammer@intel.com>
Signed-off-by: Richard Elias <richardx.elias@intel.com>
Reviewed-by: Al Morton <acmorton@att.com>
Reviewed-by: Christian Trautman <ctrautma@redhat.com>
Reviewed-by: Sridhar Rao <sridhar.rao@spirent.com>
Reviewed-by: Trevor Cooper <trevor.cooper@intel.com>