Tests clean-up when cleaning VPP code.
Tests clean-up when cleaning VPP code.

Tests are not cleaned when running "make wipe". However, it makes sense
to clean tests too since the "tested code" has been wiped and - likely -
will be rebuilt with new/extra features/requirements.

Change-Id: I34cc188e78f51d327f78f3d43cea5a82fdc6fb25
Signed-off-by: Marco Varlese <a9ee8e267a5232c6e20784faabf46e21d99abe79@suse.com>

chrisy/vpp,vpp-dev/vpp,FDio/vpp,vpp-dev/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,vpp-dev/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,vpp-dev/vpp,vpp-dev/vpp,chrisy/vpp