[MODEL] Use ActiveRecord 3 & 4 compatible order notation in integration tests

Author: karmi

elasticsearch-model/test/integration/active_record_basic_test.rb

@@ -126,7 +126,11 @@ class ::Article < ActiveRecord::Base
         should "allow ordering response.records in SQL" do
           response = Article.search query: { match: { title: { query: 'test' } } }
 
-          assert_equal 'Testing Coding', response.records.order(title: :desc).first.title
+          if ::ActiveRecord.respond_to?(:version) && ::ActiveRecord.version.to_s > '4'
+            assert_equal 'Testing Coding', response.records.order(title: :desc).first.title
+          else
+            assert_equal 'Testing Coding', response.records.order('title DESC').first.title
+          end
         end
       end