use class_attribute instead of the deprecated class_inheritable_acces…

…sor.

lib/cucumber/rails/hooks/active_record.rb

@@ -1,6 +1,6 @@
 if defined?(ActiveRecord::Base)
   class ActiveRecord::Base
-    class_inheritable_accessor :shared_connection
+    class_attribute :shared_connection
 
     def self.connection
       self.shared_connection || retrieve_connection
@@ -12,16 +12,10 @@ def self.connection
      # as connections may vary per model as per establish_connection. This works
      # on Capybara because it starts the web server in a thread.
      ActiveRecord::Base.shared_connection = ActiveRecord::Base.connection
-     ActiveRecord::Base.descendants.each do |model|
-       model.shared_connection = model.connection
-     end
    end
 
   Before('~@javascript') do
     # Do not use a shared connection unless we're in a @javascript scenario
     ActiveRecord::Base.shared_connection = nil
-    ActiveRecord::Base.descendants.each do |model|
-       model.shared_connection = nil
-     end
   end
 end