- use new vpp ref build: 17.04-rc0~418-g374e2c5~b2044_amd64
- build tested by semiweekly job:
https://jenkins.fd.io/view/csit/job/csit-vpp-verify-master-ubuntu1604-weekly/6/
Change-Id: I33d7846534f28e91979b20ddff117cb41c1e1394 Signed-off-by: Jan Gelety <jgelety@cisco.com>