add missing fixtures to CustomFieldTest

git-svn-id: http://svn.redmine.org/redmine/trunk@13374 e93f8b46-1217-0410-a6f0-8f06a7374b81
add missing fixtures to NewsControllerTest

git-svn-id: http://svn.redmine.org/redmine/trunk@13375 e93f8b46-1217-0410-a6f0-8f06a7374b81