Enclose command args in with_venv.sh
Enclose command args in with_venv.sh

Change-Id: I6d2ca2f8fca951fe2d90265da8728438dd7d7567
Closes-Bug: #1220937

dougwig/x-neutron-fwaas,gaolichuang/neutron-fwaas,openstack/neutron-fwaas,openstack/neutron-fwaas,gaolichuang/neutron-fwaas,citrix-openstack-build/neutron-fwaas