Use --config-file argument in functional testing
Use --config-file argument in functional testing

Leftover of bug #1411194

Change-Id: I91a8ec4c5a16f12e858fd6a8a266f17bc82fcce5

rdo-management/ironic-discoverd,rdo-management/ironic-discoverd,openstack/ironic-inspector,openstack/ironic-inspector