Remove system scope token usage

Designate (like any other services) does not support the system
scope and now we are enabling the new defaults by default

- https://review.opendev.org/c/openstack/designate/+/925627

To enable the new defaults, we need to remove the usage of system
scope token from tests otherwise they fails

- https://review.opendev.org/c/openstack/designate/+/926446/

Needed-By: https://review.opendev.org/c/openstack/designate/+/925627
Needed-By: https://review.opendev.org/c/openstack/requirements/+/925464
Change-Id: I8162819f35e7aba5f9c5fab77f0308faf73287ea
30 files changed