MDL-64004 webservice: Do not update accesstime

Do not update the automatically update the course access time when a
course is accessed via a webservice or ajax.

lib/moodlelib.php

@@ -3108,7 +3108,10 @@ function require_course_login($courseorid, $autologinguest = true, $cm = null, $
             // If $PAGE->course, and hence $PAGE->context, have not already been set up properly, set them up now.
             $PAGE->set_course($PAGE->course);
         }
-        user_accesstime_log(SITEID);
+        // Do not update access time for webservice or ajax requests.
+        if (!WS_SERVER && !AJAX_SCRIPT) {
+            user_accesstime_log(SITEID);
+        }
         return;
 
     } else {