Switch Neutron RBAC flag in testing

Neutron bobcat release has enabled the RBAC new defaults
by default. With the latest release of Neutron have new
defaults enable and devstack (depends on) made NEUTRON_ENFORCE_SCOPE
flag to True by default. Tempst need to switch the flag too so that
we test new RBAC by default and old RBAC in old RBAC job.

Depends-On: https://review.opendev.org/c/openstack/devstack/+/899306
Change-Id: I81c4dc11b16f27d6f074e84ff54363e7b415e5b3
1 file changed