Fix "PSR1 Classes ClassDeclaration MultipleClasses" issue in main/exercise/export/scorm/scorm_classes.php

[jmontoyaa]

Each class must be in a file by itself

https://codeclimate.com/github/chamilo/chamilo-lms/main/exercise/export/scorm/scorm_classes.php#issue_58d3501a054ba3000100a0e3

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[christianbeeznest]

It is done with this PR #6375

Thanks for confirmation.