Fix devstack all-in-one installation
Fix devstack all-in-one installation

7c06ec1d691f3a52a8f8810cfa5e66be2116ce2c splitted q-svc and q-agt
installations, but did not allow both at the same time

Change-Id: Iaee154aaf8b52a69f4e3dc47324a4efd98c72f76

openstack/networking-sfc,openstack/networking-sfc