do not attempt to mount vagrant share

Vagrantfile

@@ -2,6 +2,7 @@
 # vi: set ft=ruby :
 
 Vagrant.configure("2") do |config|
+  config.vm.synced_folder '.', '/vagrant', disabled: true
   config.vm.define "ub1404" do |ub1404|
     ub1404.vm.box = "metasploitable3-ub1404"
     ub1404.vm.hostname = "metasploitable3-ub1404"

packer/templates/vagrantfile-windows_2008_r2.template

@@ -4,6 +4,7 @@
 Vagrant.require_version ">= 1.6.2"
 
 Vagrant.configure("2") do |config|
+    config.vm.synced_folder '.', '/vagrant', disabled: true
     config.vm.define "vagrant-windows-2008-r2"
     config.vm.box = "windows_2008_r2"
     config.vm.communicator = "winrm"