Update of VPP_STABLE_VER files

- use new vpp ref build - ubuntu 16.04:
  17.10-rc0~154-gb2215d6~b2690_amd64

- build tested by semiweekly job:
  https://jenkins.fd.io/view/csit/job/csit-vpp-verify-master-ubuntu1604-semiweekly/63/

NOTE: centos7 build not updated because of issue with deletion of tap interface

Change-Id: I937ea3d106f7e62ccd977bcd3114b17326912e82
Signed-off-by: Jan Gelety <jgelety@cisco.com>