64-bit is more common and works fine.

Tools/Vagrant/Vagrantfile

@@ -5,7 +5,7 @@
 VAGRANTFILE_API_VERSION = '2'
 
 Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
-  config.vm.box = 'ubuntu/trusty32'
+  config.vm.box = 'ubuntu/trusty64'
 
   config.vm.provider 'virtualbox' do |vb|
     #vb.gui = true