Rename Evaluator and change publicKey Driver

Rename Evaluator and change publicKey Hello Driver
PublicKey change for HelloDriver
Shrunk the dependency tree
  * Marked all Hadoop dependencies as `provided`
Merge pull request #739 from Microsoft-CISL/weimer_shrink_jar

Shrunk the dependency tree
Merge pull request #738 from Microsoft-CISL/Julia-RenameEvaluator-and-update-publicKey

Julia rename evaluator and update public key for HelloDriver
Fix CLASSPATH and add a usage example
Merge pull request #741 from Microsoft-CISL/bgchun-fix-run-script

Fix CLASSPATH and add a usage example
tmp
avoid use of configuration string on public api