- use new vpp ref build: 17.07-rc0~81-gd927834~b2184_amd64
- build tested by semiweekly job:
https://jenkins.fd.io/view/csit/job/csit-vpp-verify-master-ubuntu1604-semiweekly/26/
Change-Id: I96684c6b17a4bb64b4070e440150ff4cac9a57a9 Signed-off-by: Jan Gelety <jgelety@cisco.com>