Revert "minor #1410 Update testing.rst - preventing Fatal Error: Class 'Silex\WebTestCase' not found (Czarnodziej)"
Revert "minor #1410 Update testing.rst - preventing Fatal Error: Class 'Silex\WebTestCase' not found (Czarnodziej)"

This reverts commit af39ead000f67175ef41bcf9ea72a68a76fd77a5, reversing
changes made to a102df4dcfda3676348e816993de06c038b4aa0e.

romainneutron/Silex,fabpot/Silex,silexphp/Silex,romainneutron/Silex,fabpot/Silex,romainneutron/Silex,gencer/Silex