tree dd2c2e4b1396317d248ae6514a426e24723a9de1
parent 38240878ad6d80bc716c2563869cc8ee8758100f
author Charles Chan <rascov@gmail.com> 1533449427 -0700
committer Charles Chan <charles@opennetworking.org> 1572650389 +0000

Upgrade to Ubuntu 18.04

In Ubuntu 18.04, kernal is 4.15 and ovs is 2.9.0.
We don't need to upgrade them separately to support 0x88a8 double tagged traffic.

Vagrant reload plugin is also not necessary anymore

Change-Id: I1e084fadacba48d1802cfef152a36f5ac5359790