log haproxy and x_request_id

This should be changed back:

> You are using a deprecated config setting "pattern" set in grok. Deprecated settings will continue to work, but are scheduled for removal from logstash in the future. You should use this instead: match => { "message" => "your pattern here" } If you have any questions about this, please visit the #logstash channel on freenode irc. {:name=>"pattern", :plugin=><LogStash::Filters::Grok --->, :level=>:warn}