Log Message:
Update ruby-test-unit to 3.2.3.

## 3.2.3 - 2016-11-25 {#version-3-2-3}

### Fixes

  * Fixed a bug that `--order` isn't applied.
    [GitHub#129][Reported by V«¿t Ondruch]

### Thanks

  * V«¿t Ondruch

## 3.2.2 - 2016-11-02 {#version-3-2-2}

### Improvements

  * Improved Travis CI configuration.
    [GitHub#123][Patch by Ryunosuke SEATO]

  * Supported Java native exception.
    [GitHub#126][Reported by Bob Saveland]

### Fixes

  * doc: Fixed markup. [GitHub#127][Patch by Tomohiro Hashidate]

  * Fixed a bug that `--location=LINE` may not detect a test when
    fixtures are defined before any tests:

        1 class MyTestCase < Test::Unit::TestCase
        2   setup do
        3   end
        4
        5   test "xxx" do
        6   end
        7 end

    `--location=5` couldn't find the `xxx` test.

    [Reported by Ryota Sasabe]

### Thanks

  * Ryunosuke Sato

  * Tomohiro Hashidate

  * Bob Saveland

  * Ryota Sasabe