Use Ubuntu14.04 box instead of 12.04

toolset/deployment/vagrant/Vagrantfile

@@ -1,9 +1,8 @@
 # -*- mode: ruby -*-
 # vi: set ft=ruby :
 Vagrant.configure("2") do |config|
-  config.vm.hostname = "FrameworkBenchmarks"
-  config.vm.box = "precise64"
-  config.vm.box_url = "http://files.vagrantup.com/precise64.box"
+  config.vm.hostname = "TFB"
+  config.vm.box = "ubuntu/trusty64"
   
   config.vm.provider :virtualbox do |vb|
     vb.customize ["modifyvm", :id, "--memory", "2048"]