elasticsearch/elasticsearch — pull request #6106 by dakrone (2014-05-09 12:07:34+00:00)
Title: Add Groovy as a scripting language, switching default from Mvel -> Groovy

I'm currently working on sandboxing Groovy, but I wanted to get the discussion started/confirmed for where this is landing, 1.2+, or only the master (2.0) branch.