The OS edit integration test is failing since merging the FK support:
http://ci.theforeman.org/job/test_develop_integration/5/

Mysql2::Error: Cannot add or update a child row: a foreign key constraint fails (`test_develop_integration-3-test`.`os_default_templates`, CONSTRAINT `os_default_templates_config_template_id_fk` FOREIGN KEY (`config_template_id`) REFERENCES `config_templates` (`id`)): UPDATE `os_default_templates` SET `config_template_id` = 0, `updated_at` = '2013-09-11 09:54:36' WHERE `os_default_templates`.`id` = 281110143 (ActiveRecord::InvalidForeignKey)
...
/var/lib/workspace/workspace/test_develop_integration/database/mysql/ruby/1.8.7/test/integration/operatingsystem_test.rb:24:in `test_0003_edit page'

http://ci.theforeman.org/job/test_develop_integration/5/database=mysql,ruby=1.8.7/testReport/junit/%28root%29/OperatingsystemTest/test_0003_edit_page/