Fix Vagrant by switching to Ubuntu image
This fixes error:
```
Vagrant attempted to execute the capability 'configure_networks'
```
@@ -12,7 +12,8 @@ Vagrant.configure(2) do |config|
# Every Vagrant development environment requires a box. You can search for
# boxes at https://atlas.hashicorp.com/search.
- config.vm.box = "hashicorp/precise64"
+ #config.vm.box = "hashicorp/precise64"
+ config.vm.box = "ubuntu/precise64"
# Disable automatic box update checking. If you disable this, then
# boxes will only be checked for updates when the user runs
