MDL-38230 mod_quiz: Create UI for removing of quiz access rule addons

mod/quiz/classes/plugininfo/quizaccess.php

@@ -30,6 +30,7 @@ defined('MOODLE_INTERNAL') || die();
 
 class quizaccess extends base {
     public function is_uninstall_allowed() {
-        return false;
+        // Only allow uninstall of non-core access rules.
+        return !$this->is_standard();
     }
 }

mod/quiz/version.php

@@ -24,7 +24,7 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$plugin->version   = 2015051100;
+$plugin->version   = 2015051101;
 $plugin->requires  = 2015050500;
 $plugin->component = 'mod_quiz';
 $plugin->cron      = 60;