Updates to /mod/scormcloud/locallib.php

2 commits to resolve issues experienced on a custom Moodle installation.

Commit #b8d4986: The cohorts pages were found to have issues loading under Apache (fine with Nginx) - when PHP encountered the require_once('lib.php') in /mod/scormcloud/locallib.php it fell back to where the script was running to look for it, and found /cohort/lib.php and thought it's the file we wanted to include.

Commit #b6b5781: Chrome browser was unable to load the SCORM reporting widgets on a secured site due to having to load remote unsecured content - Firefox browser was fine. This change omits the security scheme on the remote URL to allow remote content to load as secure if required.