Gather initializers from railties in engines to get rid of additional…

… looping through initializers

railties/lib/rails/application/railties.rb

@@ -16,16 +16,6 @@ def railties
       def engines
         @engines ||= ::Rails::Engine.subclasses.map(&:instance)
       end
-
-      def plugins
-        @plugins ||= super + plugins_for_engines
-      end
-
-      def plugins_for_engines
-        engines.map { |e|
-          e.railties.plugins
-        }.flatten
-      end
     end
   end
 end

railties/lib/rails/engine.rb

@@ -158,6 +158,13 @@ def call(env)
       app.call(env)
     end
 
+    def initializers
+      initializers = []
+      railties.all { |r| initializers += r.initializers }
+      initializers += super
+      initializers
+    end
+
     # Add configured load paths to ruby load paths and remove duplicates.
     initializer :set_load_path, :before => :bootstrap_hook do
       _all_load_paths.reverse_each do |path|