ZF-8599: Session tests fail unless phpunit is run with --stderr
Many Zend_Session unit tests fail with with error like:
Zend_Session_Exception: Session must be started before any output has been sent to the browser; output started in /usr/local/zend/share/pear/PHPUnit/Util/Printer.php/173
unless option --stderr is given to phpunit. It should somehow be fixed or there should be some clear instruction in the docs, or tests - somehow this should be cleaned up.