cfg.CONF must not be used directly

cfg.CONF must not be used directly, Config().oslo_conf_obj must be used
instead.

Closes-bug: #1737119

Change-Id: I58ec9e25c7f04a8352535d8861e09c7e4c4c0a9d

keystonemiddleware/auth_token/__init__.py

@@ -559,6 +559,8 @@ class AuthProtocol(BaseAuthProtocol):
                                    _base.AUTHTOKEN_GROUP,
                                    list_opts(),
                                    conf)
+        if self._conf.oslo_conf_obj != cfg.CONF:
+            oslo_cache.configure(self._conf.oslo_conf_obj)
 
         token_roles_required = self._conf.get('service_token_roles_required')
 
@@ -957,9 +959,8 @@ class AuthProtocol(BaseAuthProtocol):
 
     def _create_oslo_cache(self):
         # having this as a function makes test mocking easier
-        conf = cfg.CONF
         region = oslo_cache.create_region()
-        oslo_cache.configure_cache_region(conf, region)
+        oslo_cache.configure_cache_region(self._conf.oslo_conf_obj, region)
         return region
 
     def _token_cache_factory(self):

releasenotes/notes/bug-1737119-4afe548d28fbf8bb.yaml

@@ -0,0 +1,6 @@
+---
+fixes:
+  - >
+    [`bug 1737119 <https://bugs.launchpad.net/keystonemiddleware/+bug/1737119>`_]
+    If the application was not using the global cfg.CONF object, the configuration
+    was not read from the configuration file. This have been fixed.