expose the user info url as a configuration

Change-Id: Ia19c00b04a380fe862b7a67061d9ece2b34ad1ab

mistral/auth/keycloak.py

@@ -68,7 +68,7 @@ class KeycloakAuthHandler(auth.AuthHandler):
         # to use user info endpoint which also takes exactly one parameter
         # (access token) and replies with error if token is invalid.
         user_info_endpoint = (
-            "%s/realms/%s/protocol/openid-connect/userinfo" %
+            ("%s" + CONF.keycloak_oidc.user_info_endpoint_url) %
             (CONF.keycloak_oidc.auth_url, realm_name)
         )
 

mistral/config.py

@@ -455,7 +455,12 @@ keycloak_oidc_opts = [
         'insecure',
         default=False,
         help=_('If True, SSL/TLS certificate verification is disabled')
-    )
+    ),
+    cfg.StrOpt(
+        'user_info_endpoint_url',
+        default='/realms/%s/protocol/openid-connect/userinfo',
+        help='Endpoint against which authorization will be performed'
+    ),
 ]
 
 openstack_actions_opts = [