test for correct HLL bytebuffer folding

preserve segment order when pulling from cache

Fix inverted lexicographic topns and topns with dim extraction dimension specs

Fix edge cases in HLL folding

Make RabbitMQ Firehose resilient to broker deconnections

upgrade jetty version

Removed duplicated dependency

Improve ingestion MR job completion time.

CombineTextInputFormat instead of TextInputFormat combines multiple splits for a single mapper and reduces the strain on hadoop platform. It greatly improves job completion time as there are fewer number of mappers to bookkeep.

CombineTextInputFormat instead of TextInputFormat combines multiple splits for a single mapper and reduces the strain on hadoop platform. It greatly improves job completion time as there are fewer number of mappers to bookkeep.

upgrade jetty version to 9.1.5.v20140505