examples/tep_term: remove this application

examples/tep_term: remove this application

This example sets up a scenario that VXLAN packets can be received
by different PF queues based on VNID and each queue is bound to a VM
with a VNID so that the VM can receive its inner packets.

Usually, OVS is used to do the software encap/decap for VXLAN packets.

And the VXLAN packets offloading can be replaced with flow rules in
testpmd like Chapter "Sample VXLAN flow rules" in Testpmd Application
User Guide.

And this example hasn't been used for a long time.

So deprecate this example.

Signed-off-by: Xiaoyun Li <xiaoyun.li@intel.com>
Acked-by: Thomas Monjalon <thomas@monjalon.net>
Acked-by: Andrew Rybchenko <arybchenko@solarflare.com>
Acked-by: Ferruh Yigit <ferruh.yigit@intel.com>