Have vpnaas job definition inherit irrelevant files

The neutron-temptest-plugin-vpnaas jobs are being run
even if files like setup.cfg are updated. Instead of
updating its irrelevant-files definition, update the
default one so it can apply to all neutron* repos.

Change-Id: I36b73c44bf65ef4b467a1cceccea2138ba75dd8d
1 file changed