Fixes #77: Make sure playbook has become: yes set instead of in Vagrantfile.

nodejs/Vagrantfile

@@ -16,6 +16,5 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
   # Ansible provisioner.
   config.vm.provision :ansible do |ansible|
     ansible.playbook = "provisioning/playbook.yml"
-    ansible.become = true
   end
 end

nodejs/provisioning/playbook.yml

@@ -1,5 +1,6 @@
 ---
 - hosts: all
+  become: yes
 
   vars:
     # Vars can also be passed in via CLI with `--extra-vars="name=value"`.