Bug fix: ensure to use autoload = false in class_exists() in low-hanging fruit in Factories::locateClass()

[samsonasik]

I tried latest dev-develop when running test in a codeigniter4 module and without set autoload=false in 2nd parameter of class_exists() in Factories::locateClass(), I got the error:

Cannot declare class Config\App, because the name is already in use

at APPPATH/Config/App.php:7

Backtrace:
  1    [internal function]
       CodeIgniter\Debug\Exceptions()->shutdownHandler()


Fatal error: Cannot declare class Config\App, because the name is already in use in /Users/samsonasik/www/codeigniter4-files/vendor/codeigniter4/codeigniter4/app/Config/App.php on line 7

This patch fixed the issue.

Checklist:

• Securely signed commits

[samsonasik]

@MGatner above error happen when I tried to test your codeigniter4-files module in php 7.4.9. Update the autoload to false in 2nd class_exists above fix the issue.