test: route: add auth_sources test defined at r8162

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@8407 e93f8b46-1217-0410-a6f0-8f06a7374b81

--HG--
extra : source : 7c90a0220a4ae2afa915f2ad8cd85fa861165f2f