Merge pull request #8320 from senny/active_model_log_folder

Log output from activemodel's railtie_test directly to STDOUT.

There's no logging going on here, but since we initialize the app, the
logger is set and the folder is automatically created. With this change,
the default logger is not created, so there is no logging folder anymore.

Conflicts:
	activemodel/test/cases/railtie_test.rb

activemodel/test/cases/railtie_test.rb

@@ -9,6 +9,7 @@ class RailtieTest < ActiveModel::TestCase
 
     @app ||= Class.new(::Rails::Application) do
       config.eager_load = false
+      config.logger = Logger.new(STDOUT)
     end
   end