config_service: fetch repos and metadata concurrently

appengine/config_service/acl_test.py

Index: appengine/config_service/acl_test.py
diff --git a/appengine/config_service/acl_test.py b/appengine/config_service/acl_test.py
index e7b38bac07c92eca5d14fba6276c83cb7275c7f8..7981f92c4c5eba508f4acd810f89f5f5b7bf7742 100755
--- a/appengine/config_service/acl_test.py
+++ b/appengine/config_service/acl_test.py
@@ -64,11 +64,10 @@ class AclTestCase(test_case.TestCase):
     self.assertFalse(can_read_config_set('services/swarming'))
 
   def test_has_project_access_group(self):
-    self.mock(projects, 'get_metadata', mock.Mock())
-    projects.get_metadata.return_value = {
+    self.mock(projects, 'get_metadata_async', mock.Mock(return_value=future({
       'secret': project_config_pb2.ProjectCfg(
           access=['group:googlers', 'a@a.com']),
-    }
+    })))
 
     self.assertFalse(can_read_config_set('projects/secret'))
 
@@ -79,11 +78,10 @@ class AclTestCase(test_case.TestCase):
     self.assertTrue(can_read_config_set('projects/secret'))
 
   def test_has_project_access_identity(self):
-    self.mock(projects, 'get_metadata', mock.Mock())
-    projects.get_metadata.return_value = {
+    self.mock(projects, 'get_metadata_async', mock.Mock(return_value=future({
       'secret': project_config_pb2.ProjectCfg(
           access=['group:googlers', 'a@a.com']),
-    }
+    })))
 
     self.assertFalse(can_read_config_set('projects/secret'))