[TASK] Update Localconfiguration according to TYPO3 master

Some minor adjustments to keep up with latest TYPO3 master (6.2).
[TASK] Development and debugging improvements

* add info.php file
* raise RAM to 1 GiB to make PHPUnit tests executable via command line
* add Apache user to group "vagrant" to avoid conflicts when executing PHPUnit tests
* fix folder permissions to enable dedicated PHP log in Apache log dir
* add hint how to avoid debugging interruptions by BE login check