providers/hyperv: update driver stuff

plugins/providers/hyperv/driver.rb

@@ -9,11 +9,11 @@ module VagrantPlugins
     class Driver
       ERROR_REGEXP  = /===Begin-Error===(.+?)===End-Error===/m
       OUTPUT_REGEXP = /===Begin-Output===(.+?)===End-Output===/m
-      attr_reader :vm_id, :machine
 
-      def initialize(machine)
-        @vm_id = machine.id
-        @machine = machine
+      attr_reader :vm_id
+
+      def initialize(id)
+        @vm_id = id
       end
 
       def execute(path, options)

plugins/providers/hyperv/provider.rb

@@ -31,12 +31,6 @@ module VagrantPlugins
         machine_id_changed
       end
 
-      # If the machine ID changed, then we need to rebuild our underlying
-      # driver.
-      def machine_id_changed
-        @driver = Driver.new(@machine)
-      end
-
       def action(name)
         # Attempt to get the action method from the Action class if it
         # exists, otherwise return nil to show that we don't support the
@@ -46,6 +40,10 @@ module VagrantPlugins
         nil
       end
 
+      def machine_id_changed
+        @driver = Driver.new(@machine.id)
+      end
+
       def state
         state_id = nil
         state_id = :not_created if !@machine.id