ELIS-8988: Fix multiple export rows in version1elis for same class instance enrolment record.

Author: brentboghosian

exportplugins/version1elis/version1elis.class.php

@@ -160,6 +160,7 @@ public function init($targetstarttime = 0, $lastruntime = 0) {
                 {$extra_joins}
                 WHERE stu.completestatusid = ?
                 {$time_condition}
+                GROUP BY stu.id
                 ORDER BY u.idnumber ASC,
                          crs.idnumber ASC,
                          stu.completetime ASC,