test/distributor: add test with packets marking

test/distributor: add test with packets marking

All of the former tests analyzed only statistics
of packets processed by all workers.
The new test verifies also if packets are processed
on workers as expected.
Every packets processed by the worker is marked
and analyzed after it is returned to distributor.

This test allows finding issues in matching algorithms.

Signed-off-by: Lukasz Wojciechowski <l.wojciechow@partner.samsung.com>
Acked-by: David Hunt <david.hunt@intel.com>