system-dpdk: Update test suite for non-phy testing

system-dpdk: Update test suite for non-phy testing

This allows a system that doesn't have a dedicated DPDK nic to
execute some DPDK tests.  In this fashion, tests that operate on
virtual ports (such as dpdkvhostuserclient) can be executed in
a wider set of environments.

Signed-off-by: Aaron Conole <aconole@redhat.com>
Co-authored-by: Bala Sankaran <bsankara@redhat.com>
Signed-off-by: Bala Sankaran <bsankara@redhat.com>
Signed-off-by: Ian Stokes <ian.stokes@intel.com>