Upgrade jetty version
- supports Java8
- Async I/O Proxying
- other jetty bug fixes

some minor cleanups to ingest firehose

Conflicts:
	server/src/test/java/io/druid/realtime/firehose/CombiningFirehoseFactoryTest.java

switch back to noop task, its confusing to have a reinvest task that
does nothing.
fix compilation

An alternative way to disable middlemanagers based on worker version

Rejiggering the cache

Functionality to ingest a Druid segment and change the schema

fix IndexOutOfBoundsException
fix ingestFirehose

Conflicts:
	pom.xml

committed it by mistake.

Add ShardSpec Lookup

fix storage class npe

Remove redundant forking task runner config