fail task on exception

If the task announcement throw exception, set status to fail instead of
retrying it again and again.

FiltereServerView

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