change venb image to trusty-server-multi-nic
change venb image to trusty-server-multi-nic

Change-Id: I4b49c22aa3e22f549de47d674ec0f2b1d437da19
(cherry picked from commit d07506ae943c3dafeb7f4ee6e729ce7faaee90b0)

opencord/platform-install,opencord/platform-install