slipped one - makes no sense to run the trigger tests on AR < 3.2

Author: kares

test/db/postgresql/table_name_test.rb

@@ -93,6 +93,6 @@ class SerialWithTrigger < ActiveRecord::Base;
     assert sn.reload
 
     SerialWithTrigger.columns
-  end
+  end if ar_version('3.1')
 
 end