running change column tests with postgres (as well) should not hurt

Author: kares

test/db/postgresql/change_column_test.rb

@@ -0,0 +1,6 @@
+require 'db/postgres'
+require 'change_column_test_methods'
+
+class PostgreSQLChangeColumnTest < Test::Unit::TestCase
+  include ChangeColumnTestMethods
+end