Replace ActiveSupport::OrderedHash with Hash because Ruby 1.9 Hash is…

… ordering-aware and we no longer support Ruby 1.8

core/app/models/spree/order/checkout.rb

@@ -18,8 +18,7 @@ def self.checkout_flow(&block)
           end
 
           def self.define_state_machine!
-            # Needs to be an ordered hash to preserve flow order
-            self.checkout_steps = ActiveSupport::OrderedHash.new
+            self.checkout_steps = {}
             self.next_event_transitions = []
             self.previous_states = [:cart]
 
@@ -110,7 +109,7 @@ def self.next_event_transitions
           end
 
           def self.checkout_steps
-            @checkout_steps ||= ActiveSupport::OrderedHash.new
+            @checkout_steps ||= {}
           end
 
           def self.add_transition(options)

core/lib/tasks/core.rake

@@ -16,7 +16,7 @@ use rake db:load_file[/absolute/path/to/sample/filename.rb]}
     dir = args.dir
     dir = File.join(Rails.root, "db", dir) if Pathname.new(dir).relative?
 
-    ruby_files = ActiveSupport::OrderedHash.new
+    ruby_files = {}
     Dir.glob(File.join(dir , '**/*.{rb}')).each do |fixture_file|
       ext = File.extname fixture_file
       ruby_files[File.basename(fixture_file, '.*')] = fixture_file