New option TEST_DEBUG=1 turns on test framework debugging, which
currently consists of printing difference in allocated objects/memory
and also creates reference graphs for any unfreed VppPapiProvider/VPP
objects - these take a lot of memory and thus should be freed regularly.
Change-Id: I29db0c1341009d4b5c5df9222d14f3095883fd0f
Signed-off-by: Klement Sekera <ksekera@cisco.com>
