HIVE-8271: Relocate jackson within hive-exec.jar for hadoop-2.4 compat (Gopal V, reviewed by Vikram Dixit)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.14@1628776 13f79535-47bb-0310-9956-ffa450edef68