Update release Vagrantfile for test-ficus

vagrant/release/devstack/Vagrantfile

-Vagrant.require_version ">= 1.6.5"
+Vagrant.require_version ">= 1.8.7"
 unless Vagrant.has_plugin?("vagrant-vbguest")
   raise "Please install the vagrant-vbguest plugin by running `vagrant plugin install vagrant-vbguest`"
 end
@@ -44,6 +44,7 @@ end
 # to a name and a file path, which are used for retrieving
 # a Vagrant box from the internet.
 openedx_releases = {
+  "ned/test-ficus.2" => "ned-test-ficus-devstack-2016-12-20",
   "open-release/eucalyptus.master" => "eucalyptus-devstack-2016-09-01",
   "open-release/eucalyptus.1rc2" => "eucalyptus-devstack-2016-08-19",
   "open-release/eucalyptus.1" => "eucalyptus-devstack-2016-08-19",