util, finagle, twitter-server, finatra, ostrich - Upgrade to Jackson 2.8.4
util, finagle, twitter-server, finatra, ostrich - Upgrade to Jackson 2.8.4

Problem/Solution

Upgrade Jackson dependencies to version 2.8.4

RB_ID=889884

BuoyantIO/twitter-server,BuoyantIO/twitter-server,twitter/twitter-server,BuoyantIO/twitter-server,twitter/twitter-server,BuoyantIO/twitter-server,twitter/twitter-server