providers/virtualbox: Run post-boot after boot but before wait for SSH

[GH-2048]

CHANGELOG.md

@@ -37,6 +37,8 @@ IMPROVEMENTS:
     and mounting NFS. [GH-2086]
   - guests/suse: Supports private/public networks. [GH-1689]
   - hosts/fedora: Support RHEL as a host. [GH-2088]
+  - providers/virtualbox: "post-boot" customizations will run directly
+    after boot, and before waiting for SSH. [GH-2048]
   - provisioners/ansible: Ansible `inventory_path` can be a directory now. [GH-2035]
   - provisioners/ansible: Extra verbose option by setting `config.verbose`
     to `extra`. [GH-1979]

plugins/providers/virtualbox/action.rb

@@ -71,8 +71,8 @@ module VagrantPlugins
           b.use SaneDefaults
           b.use Customize, "pre-boot"
           b.use Boot
-          b.use WaitForCommunicator, [:starting, :running]
           b.use Customize, "post-boot"
+          b.use WaitForCommunicator, [:starting, :running]
           b.use CheckGuestAdditions
         end
       end