As part of the the DPDK Test Suite testing there is a requirement to identify
packets through the verbose output. An easy and reliable way to achieve this is
to set a L4 port number and check it against the results. At the moment,
testpmd only reports a destination UDP port when a VXLAN packet is found. This
ticket proposes to display the source and/or TCP/UDP ports anytime a L4
protocol is found in the packet.