Correctly set RUBYLIB for JRuby.
[rabbitmq] March Hare 2.1.0+

[Release notes](http://blog.rubyrabbitmq.info/blog/2014/01/16/march-hare-2-dot-1-0-is-released/): nothing that may affect Logstash, though.
Merge pull request #970 from michaelklishin/patch-1

[rabbitmq] March Hare 2.1.0+
Work around mutex lock in geoip ruby module. Doing it this way consumes slightly more memory but unblocks the threads when there is a high amount of concurrency against geoip lookups (eg, when you are processing web server logs).
Merge pull request #990 from avleen/geoip_mutex

Work around mutex lock in geoip ruby module. This measurably helps performance by avoiding locking when using multiple filter workers. Every copy of a geoip filter in each filter worker now gets a thread-local GeoIP handle.
Merge pull request #941 from buckett/jruby-dev

Correctly set RUBYLIB for JRuby.
Merge branch 'master' of https://github.com/logstash/logstash into eventify
move eventify code into decorate, check to see if we are dealing with an event already
removing eventify call