Fix unit tests

PHPUnit 4.3.1 by Sebastian Bergmann.

Configuration read from /home/fox/src/php/ezsystems/zetacomponents/MvcTools/phpunit.xml.dist

...............................................................  63 / 168 ( 37%)
............................................................... 126 / 168 ( 75%)
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Time: 5.78 seconds, Memory: 11.75Mb

OK (168 tests, 352 assertions)

Because of this happening sometimes : 

$ composer --dev install
Warning: This development build of composer is over 30 days old. It is recommended to update it by running "/home/travis/.phpenv/versions/5.6/bin/composer self-update" to get the latest version.
Loading composer repositories with package information
Installing dependencies (including require-dev)
\- Installing zetacomponents/base (1.9)
Downloading: connection...Failed to download zetacomponents/base from dist: Could not authenticate against github.com
Now trying to download from source
\- Installing zetacomponents/base (1.9)
Cloning f20df24e8de3e48b6b69b2503f917e457281e687
\- Installing zetacomponents/unit-test (1.0.2)
Downloading: connection...Failed to download zetacomponents/unit-test from dist: Could not authenticate against github.com
Now trying to download from source
\- Installing zetacomponents/unit-test (1.0.2)
Cloning 075742e2ad692c58da4dc593518a4d110f7eb822

See https://travis-ci.org/zetacomponents/Feed/jobs/37597003