Change Vagrantfile to use the same base box for all environments. Should save considerable disk space.

Author: mvousden

roles/create_VM/templates/Vagrantfile

@@ -12,7 +12,7 @@ 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 = "{{ vm_name }}"
+  config.vm.box = "virtualmicromagnetics_base"
 
   # The url from where the 'config.vm.box' box will be fetched if it
   # doesn't already exist on the user's system.