Add test_openstack_client_config_generation_with_project_region_name test

awx/main/tests/data/inventory/plugins/openstack/files/file_reference

@@ -9,3 +9,4 @@ clouds:
       username: fooo
     private: true
     verify: false
+    region_name: fooo

awx/main/tests/unit/test_tasks.py

@@ -246,6 +246,52 @@ def test_openstack_client_config_generation_with_project_domain_name(mocker, sou
     }
 
 
+@pytest.mark.parametrize("source,expected", [
+    (None, True), (False, False), (True, True)
+])
+def test_openstack_client_config_generation_with_project_region_name(mocker, source, expected, private_data_dir):
+    update = tasks.RunInventoryUpdate()
+    credential_type = CredentialType.defaults['openstack']()
+    inputs = {
+        'host': 'https://keystone.openstack.example.org',
+        'username': 'demo',
+        'password': 'secrete',
+        'project': 'demo-project',
+        'domain': 'my-demo-domain',
+        'project_domain_name': 'project-domain',
+        'project_region_name': 'region-name',
+    }
+    if source is not None:
+        inputs['verify_ssl'] = source
+    credential = Credential(pk=1, credential_type=credential_type, inputs=inputs)
+
+    inventory_update = mocker.Mock(**{
+        'source': 'openstack',
+        'source_vars_dict': {}, 
+        'get_cloud_credential': mocker.Mock(return_value=credential),
+        'get_extra_credentials': lambda x: [],
+        'ansible_virtualenv_path': '/venv/foo'
+    })
+    cloud_config = update.build_private_data(inventory_update, private_data_dir)
+    cloud_credential = yaml.safe_load(
+        cloud_config.get('credentials')[credential]
+    )
+    assert cloud_credential['clouds'] == {
+        'devstack': {
+            'auth': {
+                'auth_url': 'https://keystone.openstack.example.org',
+                'password': 'secrete',
+                'project_name': 'demo-project',
+                'username': 'demo',
+                'domain_name': 'my-demo-domain',
+                'project_domain_name': 'project-domain',
+            },
+            'verify': expected,
+            'private': True,
+            'region_name': 'region-name',
+        }
+    }
+
 @pytest.mark.parametrize("source,expected", [
     (False, False), (True, True)
 ])