Allow parallel testing (#35030).

Patch by Go MAEDA.


git-svn-id: http://svn.redmine.org/redmine/trunk@20920 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/test_helper.rb

@@ -53,6 +53,8 @@ class ActionView::TestCase
 end
 
 class ActiveSupport::TestCase
+  parallelize(workers: 1)
+
   include ActionDispatch::TestProcess
 
   self.use_transactional_tests = true