Fix test_spice for rbac policy access error

The below recent tempest change modified the test_spice
to use reader role to get remote console and console auth token,
where those APIs are member and admin user APIs.

- https://review.opendev.org/c/openstack/tempest/+/972060

Change-Id: I80e27f796cb8925b5dc4e1054f4f7a8576aa39b1
Signed-off-by: Ghanshyam Maan <gmaan@ghanshyammann.com>
2 files changed