Update to phpunit 3.7.37

    $ composer update -o --no-dev
    Loading composer repositories with package information
    Updating dependencies
    - Removing symfony/yaml (v2.3.6)
    - Installing symfony/yaml (v2.5.5)
        Downloading: 100%

    - Removing phpunit/php-text-template (1.1.4)
    - Installing phpunit/php-text-template (1.2.0)
        Loading from cache

    - Removing phpunit/php-token-stream (1.2.1)
    - Installing phpunit/php-token-stream (1.2.2)
        Loading from cache

    - Removing phpunit/php-code-coverage (1.2.13)
    - Installing phpunit/php-code-coverage (1.2.18)
        Downloading: 100%

    - Removing phpunit/phpunit (3.7.28)
    - Installing phpunit/phpunit (3.7.37)
        Downloading: 100%

    Writing lock file
    Generating optimized autoload files

    $ composer show --installed
    phpunit/php-code-coverage    1.2.18
    phpunit/php-file-iterator    1.3.4
    phpunit/php-text-template    1.2.0
    phpunit/php-timer            1.0.5
    phpunit/php-token-stream     1.2.2
    phpunit/phpunit              3.7.37
    phpunit/phpunit-mock-objects 1.2.3
    symfony/yaml                 v2.5.5

Change-Id: I9314d96b82aebbdee72b9d6fbce352f6a4cafe37