[TACHYON-62] Netty

Netty implementation of the data server.

This patch is not done yet.  Its intent is to show the work I have right now for commenting.

This PR should not be merged until performance results come in.
That case is not unit tested.  Ill create a jira to test bad RPC request and try to tackle it when I am working on the remote write (plan to add better errors there).