- use new vpp ref build: 17.04-rc0~231-ge4ad8cc~b1855_amd64
- build tested by semiweekly job:
https://jenkins.fd.io/view/csit/job/csit-vpp-verify-master-ubuntu1604-semiweekly/1/
Change-Id: Ibd405c9de7dd75c3ab989987487bbbe4405d006e Signed-off-by: Jan Gelety <jgelety@cisco.com>