Remove mentions of UUID Keystone token provider

Keystone removed the UUID token provider in Rocky and Kolla Ansible
removed support for configuring it. This commit reflects these changes
in Kayobe.

Change-Id: I5a2c71e7e65f99687437f6a26a0c4a942022f4e9

ansible/roles/kolla-ansible/templates/globals.yml.j2

@@ -187,8 +187,8 @@ enable_{{ feature_flag }}: {{ hostvars[inventory_hostname]['kolla_enable_' ~ fea
 # Keystone - Identity Options
 #############################
 
-# Valid options are [ uuid, fernet ]
-#keystone_token_provider: 'uuid'
+# Valid options are [ fernet ]
+#keystone_token_provider: 'fernet'
 
 # Interval to rotate fernet keys by (in seconds). Must be an interval of
 # 60(1 min), 120(2 min), 180(3 min), 240(4 min), 300(5 min), 360(6 min),

etc/kayobe/kolla/globals.yml

 ---
 # Add extra Kolla global configuration here.
-
-# Although Kolla-Ansible provides full support for Fernet tokens, it still
-# defaults to UUID.  This setting overrides K-A and brings it in-line with
-# Keystone's default.
-#
-keystone_token_provider: 'fernet'