Get vagrant package --base working in some hacky way.

`vagrant package --base` is deprecated for a future feature so I didn't
want to waste any brain cycles on how to do this the "right" way since a
new system will be introduced to do this sort of thing in teh future.

lib/vagrant/machine.rb

@@ -46,7 +46,7 @@ module Vagrant
     # @param [Box] box The box that is backing this virtual machine.
     # @param [Environment] env The environment that this machine is a
     #   part of.
-    def initialize(name, provider_cls, config, box, env)
+    def initialize(name, provider_cls, config, box, env, base=false)
       @logger = Log4r::Logger.new("vagrant::machine")
       @logger.info("Initializing machine: #{name}")
       @logger.info("  - Provider: #{provider_cls}")
@@ -59,7 +59,13 @@ module Vagrant
 
       # Read the ID, which is usually in local storage
       @id = nil
-      @id = @env.local_data[:active][@name.to_s] if @env.local_data[:active]
+
+      # XXX: This is temporary. This will be removed very soon.
+      if base
+        @id = name
+      else
+        @id = @env.local_data[:active][@name.to_s] if @env.local_data[:active]
+      end
 
       # Initializes the provider last so that it has access to all the
       # state we setup on this machine.

plugins/commands/package/command.rb

@@ -47,8 +47,17 @@ module VagrantPlugins
       protected
 
       def package_base(options)
-        vm = Vagrant::VM.new(options[:base], @env, @env.config.global, :base => true)
-        raise Vagrant::Errors::BaseVMNotFound, :name => options[:base] if !vm.created?
+        # XXX: This whole thing is hardcoded and very temporary. The whole
+        # `vagrant package --base` process is deprecated for something much
+        # better in the future. We just hardcode this to keep VirtualBox working
+        # for now.
+        provider = nil
+        Vagrant.plugin("1").registered.each do |plugin|
+          provider = plugin.provider.get(:virtualbox)
+          break if provider
+        end
+
+        vm = Vagrant::Machine.new(options[:base], provider, @env.config.global, nil, @env, true)
         @logger.debug("Packaging base VM: #{vm.name}")
         package_vm(vm, options)
       end