config_service: fetch repos and metadata concurrently

appengine/config_service/projects_test.py

 #!/usr/bin/env python
 # Copyright 2015 The LUCI Authors. All rights reserved.
 # Use of this source code is governed under the Apache License, Version 2.0
 # that can be found in the LICENSE file.
 
 from test_env import future
 import test_env
 test_env.setup_test_env()
 
 from components.config.proto import service_config_pb2
@@ skipping 57 matching lines @@
         ],
     )
     self.assertEqual(
         projects.get_refs(['chromium']), {'chromium': expected.refs})
 
   def test_get_refs_of_non_existent_project(self):
     self.mock(projects, '_filter_existing', lambda pids: [])
     self.assertEqual(projects.get_refs(['chromium']), {'chromium': None})
 
   def test_repo_info(self):
-    self.assertEqual(projects.get_repos(['x']), {'x': (None, None)})
+    self.assertEqual(
+        projects.get_repos_async(['x']).get_result(),
+        {'x': (None, None)})
     projects.update_import_info(
         'x', projects.RepositoryType.GITILES, 'http://localhost/x')
     # Second time for coverage.
     projects.update_import_info(
         'x', projects.RepositoryType.GITILES, 'http://localhost/x')
     self.assertEqual(
-        projects.get_repos(['x']),
+        projects.get_repos_async(['x']).get_result(),
         {'x': (projects.RepositoryType.GITILES, 'http://localhost/x')})
 
     # Change it
     projects.update_import_info(
         'x', projects.RepositoryType.GITILES, 'http://localhost/y')
 
 
 if __name__ == '__main__':
   test_env.main()