[#425] Avoid deprecated API to define rake tasks with parameters

This should avoid deprecation warnings when using ChiliProject with Rake 0.9

lib/tasks/email.rake

@@ -167,7 +167,7 @@ END_DESC
     end
     
     desc "Send a test email to the user with the provided login name"
-    task :test, :login, :needs => :environment do |task, args|
+    task :test, [:login] => :environment do |task, args|
       include Redmine::I18n
       abort l(:notice_email_error, "Please include the user login to test with. Example: login=examle-login") if args[:login].blank?