Retain tmp hosts file and fix a bug where powershell mv does not move…

… folder contents, in that context it's moving a file.

lib/vagrant-hostmanager/hosts_file/updater.rb

@@ -36,14 +36,13 @@ def update_guest(machine)
 
  # upload modified file and remove temporary file
  machine.communicate.upload(file, '/tmp/hosts')
- machine.communicate.sudo("#{move_cmd} /tmp/hosts #{realhostfile}")
+ if windir
+ machine.communicate.sudo("#{move_cmd} /tmp/hosts/hosts.#{machine.name} #{realhostfile}")
+ else
+ machine.communicate.sudo("#{move_cmd} /tmp/hosts #{realhostfile}")
+ end
  end
 
- # i have no idea if this is a windows competibility issue or not, but sometimes it dosen't work on my machine
- begin
- FileUtils.rm(file)
- rescue Exception => e
- end
  end
 
  def update_host