Remove OS_AUTH_URL workaround

After [1] is merged we no longer need OS_AUTH_URL workaround which
causes that OS_AUTH_URL is set to use http instead of the https
protocol.

[1] https://review.opendev.org/c/osf/python-tempestconf/+/762923

Change-Id: Iaabebd2ff9316942c4b6c60ed78de584f1e879df

playbooks/python-tempestconf-tempest-devstack.yaml

@@ -5,13 +5,6 @@
 
 - hosts: tempest
   vars:
-    # It's important that OS_AUTH_URL is in this format:
-    # <protocol>://<host>/identity/v3
-    # In some cases it can be only: <protocol>://<host>:5000
-    # https://github.com/openstack/devstack/blob/2c9343e5db44fa7a41ca6924737331dd9088ef8f/openrc#L87-L89
-    # (mkopec) That would end up with an HTTP MaxRetryError to <host>:5000,
-    # therefor OS_AUTH_URL is defined manually
-    set_auth_url: "OS_AUTH_URL=$SERVICE_PROTOCOL://$SERVICE_HOST/identity/v3"
     devstack_base_dir: "/opt/stack"
     test_demo_user: "{{ test_demo is defined }}"
   tasks:
@@ -48,7 +41,7 @@
         name: generate-tempestconf-file
       vars:
         create_accounts_file: True
-        source_credentials_commands: "export HOST_IP={{ ansible_default_ipv4.address }}; source {{ devstack_base_dir }}/devstack/openrc {{ user }} {{ user }}; {{ set_auth_url }}"
+        source_credentials_commands: "export HOST_IP={{ ansible_default_ipv4.address }}; source {{ devstack_base_dir }}/devstack/openrc {{ user }} {{ user }}"
 
     - name: Generate tempest configuration file based on cloud credentials
       include_role: