Fix some dependencies to keep ability to start without packaging.

There were two helpful feature to speedup development.

  * after build (mvn install), ```bin/zeppelin-daemon.sh start``` start the server daemon without packaging.
  * in eclipse, or using mvn exec:java, com.nflabs.zeppelin.server.ZeppelinServer is runnable without packaging.

Somehow, these two behavior does not work.
Here i'm attaching fixes.