fix test failures (#12787)

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11179 e93f8b46-1217-0410-a6f0-8f06a7374b81
fix typo of attachments controller test names

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11180 e93f8b46-1217-0410-a6f0-8f06a7374b81