Fix the tests broken by the new add_autoload_paths_to_load_path

I didn't pay attention to CI at all -_-.

railties/test/application/configuration_test.rb

@@ -1822,7 +1822,8 @@ module ApplicationTests
       end
     end
 
-    test "autoload paths are added to $LOAD_PATH by default" do
+    test "autoload paths are not added to $LOAD_PATH if opted-in" do
+      add_to_config "config.add_autoload_paths_to_load_path = true"
       app "development"
 
       # Action Mailer modifies AS::Dependencies.autoload_paths in-place.
@@ -1838,8 +1839,7 @@ module ApplicationTests
       assert_empty Rails.configuration.paths.load_paths - $LOAD_PATH
     end
 
-    test "autoload paths are not added to $LOAD_PATH if opted-out" do
-      add_to_config "config.add_autoload_paths_to_load_path = false"
+    test "autoload paths are not added to $LOAD_PATH by default" do
       app "development"
 
       assert_empty ActiveSupport::Dependencies.autoload_paths & $LOAD_PATH
@@ -1868,10 +1868,6 @@ module ApplicationTests
         assert_includes config.autoload_once_paths, "#{app_path}/custom_autoload_once_path"
         assert_includes config.eager_load_paths, "#{app_path}/custom_eager_load_path"
       end
-
-      assert_includes $LOAD_PATH, "#{app_path}/custom_autoload_path"
-      assert_includes $LOAD_PATH, "#{app_path}/custom_autoload_once_path"
-      assert_includes $LOAD_PATH, "#{app_path}/custom_eager_load_path"
     end
 
     test "load_database_yaml returns blank hash if configuration file is blank" do

railties/test/application/initializers/load_path_test.rb

@@ -15,13 +15,13 @@ module ApplicationTests
       teardown_app
     end
 
-    test "initializing an application adds the application paths to the load path" do
+    test "initializing an application doesn't add the application paths to the load path" do
       add_to_config <<-RUBY
         config.root = "#{app_path}"
       RUBY
 
       require "#{app_path}/config/environment"
-      assert_includes $:, "#{app_path}/app/models"
+      assert_not_includes $:, "#{app_path}/app/models"
     end
 
     test "initializing an application allows to load code on lib path inside application class definition" do

railties/test/application/paths_test.rb

@@ -69,12 +69,12 @@ module ApplicationTests
     end
 
     test "load path includes each of the paths in config.paths as long as the directories exist" do
-      assert_in_load_path "app", "controllers"
-      assert_in_load_path "app", "models"
-      assert_in_load_path "app", "helpers"
       assert_in_load_path "lib"
       assert_in_load_path "vendor"
 
+      assert_not_in_load_path "app", "controllers"
+      assert_not_in_load_path "app", "models"
+      assert_not_in_load_path "app", "helpers"
       assert_not_in_load_path "app", "views"
       assert_not_in_load_path "config"
       assert_not_in_load_path "config", "locales"