Don't use tmpfs for DIB functional tests
Don't use tmpfs for DIB functional tests

We may do things that exceed the space available in a tmpfs, so point
everything at the larger mounted space.

Change-Id: Ie63a66f9c3e77a0e6351f2d058e17a5eb5a2d949

dongwenjuan/project-config,openstack-infra/project-config,Tesora/tesora-project-config,Tesora/tesora-project-config,openstack-infra/project-config,dongwenjuan/project-config