- use new vpp ref build: 16.12-rc0~55-gc27213a~b1077_amd64
- build tested by semiweekly job:
https://jenkins.fd.io/job/csit-vpp-verify-master-semiweekly/1033/
Change-Id: If73501b2ddcdfc6a33573a6c11595248ee2567d1 Signed-off-by: Jan Gelety <jgelety@cisco.com>