fix(auth): Define service_type in keystone_authtoken (#411)

* feat: Define service_type in keystone_authtoken

If application credentials with access rules are required,
an OpenStack service using keystonemiddleware to authenticate
with keystone, needs to define service_type in its configuration
file.

Once https://review.opendev.org/c/openstack/openstack-helm/+/883066
is merged, we can revert this PR.

* chore: clean-up yaml configs

---------

Co-authored-by: okozachenko1203 <okozachenko1203@users.noreply.github.com>
Co-authored-by: Mohammed Naser <mnaser@vexxhost.com>
diff --git a/roles/nova/vars/main.yml b/roles/nova/vars/main.yml
index 820b12c..02ea38d 100644
--- a/roles/nova/vars/main.yml
+++ b/roles/nova/vars/main.yml
@@ -80,6 +80,10 @@
         max_instances_per_host: 200
       glance:
         enable_rbd_download: true
+      keystone_authtoken:
+        # NOTE(okozachenko1203): We can remove it once the following is merged:
+        #                        https://review.opendev.org/883066
+        service_type: compute
       neutron:
         metadata_proxy_shared_secret: "{{ openstack_helm_endpoints['compute_metadata']['secret'] }}"
       oslo_messaging_notifications: