This statement does not serve a purpose anymore.
In a long forgotten world it indicated the main version number of PHP which the code in the file was compatible to.
http://pear.php.net/manual/en/standards.sample.php
But since PHP 5.1 and later this is only marginally true.
Thus I propose to remove it from CakePHP.
Otherwise there can be significant differences in behavior between using
an unmodifiedcomponent in testAction and using a mock as the config will not be
propogated from the controller
Since many exceptions do not have its own 'template' file, customized
APP/Controller/CakeErrorController with its own list of helpers could be
ignored.
This happens becase ExceptionRenderer is forced to to use _outputMessageSafe
when a template is missing. This causes Controller::$helpers to be reset with
default values.
Reusing controllers between various testAction calls would
mean that calls that needed to render views, would break on the
second call to testAction(). Controllers are rebuilt for each testAction()
call now.
Fixes#2142
