Avoid to define an initializer after the load_config_initializers

This make the config/initializers run before the railties are loaded
what can break some configurations.

activesupport/lib/active_support.rb

@@ -73,6 +73,14 @@ def self.eager_load!
   end
 
   cattr_accessor :test_order # :nodoc:
+
+  def self.halt_callback_chains_on_return_false
+    Callbacks::CallbackChain.halt_and_display_warning_on_return_false
+  end
+
+  def self.halt_callback_chains_on_return_false=(value)
+    Callbacks::CallbackChain.halt_and_display_warning_on_return_false = value
+  end
 end
 
 autoload :I18n, "active_support/i18n"

activesupport/lib/active_support/railtie.rb

@@ -13,13 +13,6 @@ class Railtie < Rails::Railtie # :nodoc:
       end
     end
 
-    initializer "active_support.halt_callback_chains_on_return_false", after: :load_config_initializers do |app|
-      if app.config.active_support.key? :halt_callback_chains_on_return_false
-        ActiveSupport::Callbacks::CallbackChain.halt_and_display_warning_on_return_false = \
-          app.config.active_support.halt_callback_chains_on_return_false
-      end
-    end
-
     # Sets the default value for Time.zone
     # If assigned value cannot be matched to a TimeZone, an exception will be raised.
     initializer "active_support.initialize_time_zone" do |app|

railties/lib/rails/generators/rails/app/templates/config/initializers/callback_terminator.rb

 # Be sure to restart your server when you modify this file.
 
 # Do not halt callback chains when a callback returns false.
-Rails.application.config.active_support.halt_callback_chains_on_return_false = false
+ActiveSupport.halt_callback_chains_on_return_false = false