Performance Improvements to Test

[nijel]

1. set opcache.save_comments to false
   in:
   

   docker/etc/php.ini

   Line 1872 in 9055117

   ;opcache.save_comments=1

   
   more information:
   https://secure.php.net/manual/en/opcache.configuration.php#ini.opcache.save-comments

2. set opcache.validate_timestamps to 0
   in:
   

   docker/etc/php.ini

   Line 1860 in 9055117

   ;opcache.validate_timestamps=1

   
   more information:
   https://secure.php.net/manual/en/opcache.configuration.php#ini.opcache.validate-timestamps
   will require note in documentation that changes in files content require Resetting the OpCache / Restarting PHP-FPM.

Reported by Emanuel Bronshtein.