Update fig vagrant

This fixes my issues getting the JRuby version of Panoptes running in Docker. Basically JBundler adds a `.jbundler` directory with classpath information. It's is specific to a host machine, so it needs to be deleted before the rails app is run so jbundler correclty recreates it. 
To elaborate. If we can solve the Cellect problem I'll definitely revert this to it's previous state.