Merge pull request #55 from stopfstedt/52_check_offering_instructor_g…

…roups_during_instructor_sync

check offering instructor groups before falling back to default instructors during sync.

lib.php

@@ -766,7 +766,7 @@ private function get_instructor_ids_from_group($grouptype, $groupid): array {
             $offerings = $apiclient->get_by_ids($accesstoken, 'offerings', $group->offerings);
 
             foreach ($offerings as $offering) {
-                if (empty($offering->instructors)) {
+                if (empty($offering->instructors) && empty($offering->instructorGroups)) {
                     // No instructor AND no instructor groups have been set for this offering.
                     // Fall back to the default instructors/instructor-groups defined for the learner group.
                     $instructorids = array_merge($instructorids, $group->instructors);