[COOK-3455] Add Windows Server 2012 R2 support

Signed-off-by: Seth Vargo <sethvargo@gmail.com>
[COOK-3447] Allow overriding of the default reboot timeout In windows_reboot_handler

Signed-off-by: Seth Vargo <sethvargo@gmail.com>
[COOK-2098] Fix windows_reboot

Signed-off-by: Seth Vargo <sethvargo@gmail.com>