make test: improve virtualenv patching process
make test: improve virtualenv patching process

Change-Id: I5041bdc733c4da633d83f60f7db7747b4d0b8894
Signed-off-by: Klement Sekera <b8003f27414ca85c37624503b7b4e8f8c829bb4d@cisco.com>

FDio/vpp,chrisy/vpp,milanlenco/vpp,GabrielGanne/vpp-flowtable,FDio/vpp,milanlenco/vpp,chrisy/vpp,vpp-dev/vpp,GabrielGanne/vpp-flowtable,vpp-dev/vpp,milanlenco/vpp,vpp-dev/vpp,FDio/vpp,GabrielGanne/vpp-flowtable,FDio/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,vpp-dev/vpp,milanlenco/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,vpp-dev/vpp,chrisy/vpp,chrisy/vpp,GabrielGanne/vpp-flowtable,milanlenco/vpp,GabrielGanne/vpp-flowtable,milanlenco/vpp,vpp-dev/vpp,GabrielGanne/vpp-flowtable,FDio/vpp,vpp-dev/vpp