Make Rack::Timeout less chatty, set its log level to WARN

Author: jirutka

config/initializers/timeout.rb

@@ -1,5 +1,7 @@
+require 'logger'
 require 'rack-timeout'
 
 if Config.rack_timeout > 0
   Rack::Timeout.timeout = Config.rack_timeout
+  Rack::Timeout::Logger.level = Logger::WARN
 end