[REEF-56]: Removed the shaded and test jar creation in reef-tests The prior
  addition of the `-test-jar-with-dependencies` replaces both of them. Hence,
  their creation has become redundant

JIRA:
  [REEF-56]: https://issues.apache.org/jira/browse/REEF-56

Pull Request:
  Closes #29

Author:
  Markus Weimer weimer@apache.org
Passing HttpServer port number over the bridge. It contains the changes on ClrBridge, JobDriver and Driver.dll as ClrSystemHandlerWrapper is changed
Closes #30
This checkin resolves issue #REEF-51
Author:    Julia Wang <jwang98052@yahoo.com>
address code review issues
Merge branch 'master' into REEF-54
use optional for null