Make sure that themes are reloaded after test.

git-svn-id: http://svn.redmine.org/redmine/trunk@13777 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/lib/redmine/themes_test.rb

@@ -55,5 +55,7 @@ class Redmine::ThemesTest < ActiveSupport::TestCase
     theme = Redmine::Themes.themes.pop
 
     assert_nil Redmine::Themes.theme(theme.id, :rescan => false)
+  ensure
+    Redmine::Themes.rescan
   end
 end