Correctly use number of processing threads for realtime query execution

Edited assembly.xml to exclude the selfcontained jars, and edited path o...

Edited assembly.xml to exclude the selfcontained jars, and edited path of run_example_server to use the lib/ directory instead of selfcontained jars, thus reducing the size of the assembly tarball from 150MB to 50MB.

2) Fix unit test

Changed port number for realtime server from 8080 to 8083 to make the ex...

Changed port number for realtime server from 8080 to 8083 to make the exaxmples work with the new realtime config.

2) Fix group by query to work with new unit test, fixes #232

Removed zk references from realtime config