Log Message:
Update ruby-mixlib-shellout to 2.3.2.

Release 2.3.2

* Fix bad method call in Windows Process module

Release 2.3.1

* Make Mixlib::ShellOut::EmptyWindowsCommand inherit from ShellCommandFailed

Release 2.3.0

* Add support for 'elevated' option on Windows, which logs on as batch server
  which is not affected by User Account Control (UAC)