Fix DNS issue on Ubuntu 12.10

vagrant/devstack/Vagrantfile

@@ -34,6 +34,10 @@ Vagrant.configure("2") do |config|
   config.vm.provider :virtualbox do |vb|
     vb.customize ["modifyvm", :id, "--memory", MEMORY.to_s]
     vb.customize ["modifyvm", :id, "--cpus", CPU_COUNT.to_s]
+
+    # Allow DNS to work for Ubuntu 12.10 host
+    # http://askubuntu.com/questions/238040/how-do-i-fix-name-service-for-vagrant-client
+    vb.customize ["modifyvm", :id, "--natdnshostresolver1", "on"]
   end
 
   config.vm.provision :ansible do |ansible|

vagrant/fullstack/Vagrantfile

@@ -12,6 +12,10 @@ Vagrant.configure("2") do |config|
 
     # You can adjust this to the amount of CPUs your system has available
     vb.customize ["modifyvm", :id, "--cpus", CPU_COUNT.to_s]
+
+    # Allow DNS to work for Ubuntu 12.10 host
+    # http://askubuntu.com/questions/238040/how-do-i-fix-name-service-for-vagrant-client
+    vb.customize ["modifyvm", :id, "--natdnshostresolver1", "on"]
   end
 
   config.vm.provision :ansible do |ansible|