Merge branch 'MDL-48697-master' of git://github.com/ankitagarwal/moodle

lib/classes/component.php

@@ -348,7 +348,7 @@ $cache = '.var_export($cache, true).';
             'cache'       => $CFG->dirroot.'/cache',
             'calendar'    => $CFG->dirroot.'/calendar',
             'cohort'      => $CFG->dirroot.'/cohort',
-            'completion'  => null,
+            'completion'  => $CFG->dirroot.'/completion',
             'countries'   => null,
             'course'      => $CFG->dirroot.'/course',
             'currencies'  => null,

lib/upgrade.txt

@@ -9,6 +9,7 @@ information provided here is intended especially for developers.
   Catching debugging messages when sending mail will no longer work. Use $sink = $this->redirectEmails(); and then check
   the message in the sink instead.
 * The file pluginlib.php was deprecated since 2.6 and has now been removed, do not include or require it.
+* \core_component::fetch_subsystems() now returns a valid path for completion component instead of null.
 
 === 2.8 ===